Hello
Latest version of Sonar supports Windows 10 and any devices that support windows 10. Before you upgraded you need to check your devices are Win10 compatible.
If your device is not Win10 compatible, or does not work for some reason, raise it with the manufacturer, it is not a Cakewalk issue, the buck stops with you to make sure your devices are compatible and working. BTW If you change DAWs you are likely to get similar issues.
If you have specific issues with X2A you could post in the forums, ideally one thread per issue to keep it simple. X2 should work on Windows 10 but Cakewalk has never specified it is fully Win10 compatible, you need to upgrade to latest Sonar for that.
Note the final service pack for X2 was X2A. X2 is about 3.5 years old.l, don't expect much support for a legacy product. Also note during this time Cakewalk was under Roland, it is now under Gibson.
Most of us are pretty happy with Platinum, if you aren't happy with the product before you've even used it I suggest you find alternative solutions if you decide to upgrade.
You can also roll back your operating system or ask for help in the the forums to see if we can get you working. If you've already posted please point to your specific threads.
I take issue with the phrase 'planned obselense', Windows 10 was not out when X2A came out, you read the OS specifications, and it's a given that support would run out in a year. Your scenario seems to be that you have paid for a fully featured DAW, expect it to be supported 3.5 years later, have already taken advantage of support (considerably), expected it to still be supported when you upgrade your operating system many years later (changed the goalposts yourself), and then consider yourself have been ripped off afterwards after plopping Sonar in a different environment (how much did you pay for it?).. I suspect you should review your own opinion.
With Sonar Platinum there is a monthly cycle, the software will never be obsolite. If you buy 12 months you get to keep it. So get your wallet out or stick with what you have (roll back/restore from backup/try and get it working/whatever), your choice. Otherwise reduce your expectations or change your DAW, which will also perform under similar parameters.
BTW Sonar Platinum will open X2 projects, there is your upgrade option.
Thanks...
p.s. You state you have done posts before here, however this appears to be your first post in the forums. I question why you are creating a new user account for this, and not understanding why you are posting in the feature and request forum.