One of the most common issues that breaks an Instance Operating System is when moving from non-Nitro to Nitro-based instances (t2 is non-Nitro), where necessary drivers are missing on the OS layer which causes issues when booting on the new hardware (node type). Review this blog post if it’s relevant to your issue. Edit: The above info only applies when moving from t2 to a Nitro-based instance, there won’t be any driver issue when going from say t2Micro to t2Large More on reddit.com

You haven't given any indication what performance constraints you have, or are expecting. What's the load like right now on the existing instance? Look at some perf metrics and decide if the system is using all the resources available to it. If it is, or using enough that a bump in traffic would cause it to run at >90% sure consider upgrading. But it's not clear that's the case from your post. As for what instance type you would upgrade to, that again depends on your proposed needs. If you need more memory, rather than more CPU, consider an R-type instance. If it's the inverse and you need more CPU than memory, go for a C-type instance. If you just need a decent combination of both stick with an M-type. If you need more EBS throughput look at the dedicated EBS bandwidth for different instance types and sizes and pick the one that you need. If you're on an M4 you're at least one generation of instance type behind the current, and new generations typically are priced differently, so consider that. You didn't mention if you're on-demand or purchasing RIs. If you are on-demand, just bump the instance type to whatever you want and try it out. You can just change it whenever you decide it isn't the right fit. If you need to buy an RI for the new instance type, you need to go off and do some analysis before making this choice to ensure you have the requirements nailed. More on reddit.com

Windows 11 requires TPM, so only Nitro instances that support TPM can be used for it. Note that AWS doesn't guarantee a specific instance type for workspaces. In fact, if you ask Support about it, they cannot share this information with you. One thing that I do know based on my testing is that the performance is consistent. This means that even if you have found out the instance is burstable, they must be giving you unlimited credits, therefore negating any performance concerns due to the burstable type. You can do this test very easily on your end. If you are a big customer you should contact your TAM and see if can do something without it. The reason you are not even seeing the older instance type is likely that they ran out of it / decommissioned it due to age More on reddit.com

If you're talking about Nitro VPC card, then yes all network traffic is encrypted by the Nitro VPC controller. https://docs.aws.amazon.com/whitepapers/latest/security-design-of-aws-nitro-system/the-components-of-the-nitro-system.html More on reddit.com