Azure Virtual Machines

Azure VMs will be best suited in terms of flexibility, scalability, and reliability.
Also for cloud management and optimization solutions one can trust the Azure VM. We can leverage VMs for various use cases, including application hosting, development and testing, data analysis, disaster recovery, and hybrid cloud deployments.
One more thing with Azure Is that they provide a great customer support as well

If you want to host a dedicated Windows server on the cloud, and especially if you want to integrate it with your on premises Active Directory, Azure Virtual Machines should be your first choice. Obviously running Linux on Azure works very well too, but given Azure's pricing is not the cheapest, there are other providers out there that have a better cost-benefit ratio for Linux. That said, hosting Windows on Azure can be affordable (especially when compared to other providers) if you plan your licensing, topology, and application architecture correctly.

We tend to use as much App Services, and Serverless as we can. But what those win in ease of use and efficiency, they lack in flexibility. Many workloads cannot run on those services. Especially when you need heavy and time-consuming computing. Azure Virtual Machines on the other hand, give you anything you need in terms of flexibility, since you have access to the underlying OS, and for the fraction of the price. But as always, it's a tradoff, since you also need to manage, reboot, maintain, and patch those VMs

For those who use the Azure cloud, Azure Virtual Machine is the best option for Compute resources, it provides flexible pricing plans, worldwide availability and almost any scale that you will need without wasting too much time for these resources to become available. In Azure Cloud, serverless Compute is also available, so for specific usecases, this can be used instead of Azure Virtual Machines.

Using a self-hosted integration runtime with Azure Data Factory, although only supports Windows, will make it more expensive. Hosting DevOps tools, such as Jenkins, code scanners, etc. can be set up very easily and replicated if needed. Any kind of distributed architecture, like Selenium grid for GUI testing of applications, can be set up very easily because of the myriad of possibilities for OSs.

Scaling up virtual machines is very easy and can be automated as well. Based on the inbound traffic, the virtual machines get scaled up and down. If the traffic is low, they scale down and if the traffic goes high, they scale up. Eventually, it saves the overall costs.

Azure Virtual Machines are best suited for internet-hungry applications as it provides great internet bandwidth. We have used it for our .Net development and found the VMs very responsive. Azure Virtual Machines must provide the same internet latency for Linux-based OS. Support for services is very good with the Microsoft OS but Azure Virtual Machines needs to improve the compatibility issues with the Linux OS.

I would recommend Azure Virtual Machines to anyone who has a business case for building their solutions in Azure. There are reasonable arguments to be made in favor of more stateless architectures for certain use cases, but if you are planning to use virtual machines and are in Azure this is your only option. There are different reasons why one might have a business use case for building in Azure. There are various technical reasons for choosing VMs.

It's well suited to delivering information about our sports events as during the events a lot of processing power is needed and instantly becomes available by scaling out when the event is over the service can be scaled right back making massive savings.
We use it for football, horse racing, Olympics games etc, it is also used when things happen in the world like right now there is a lot of concern over the Russia and Ukraine conflict, since the demand for this information is high we instantly scale to meet the demand of our news feed services. I believe up to 90% of the UK's News, sports and media information actually passes through our computer systems, we are a market leading news and information service and Azure Virtual Machines provide us with the reliability that we need so that we can provide a rock solid reliable news and information service to the world.

When you need to have multiple servers for different operations, you don't really "need" to have a different server, you can use Azure Virtual Machine to create multiple servers fit for your specifics needs.