I have stuck with Macs throughout the bad experiences for a very good reason. I like Macs, I enjoy the workflow, and I especially enjoy the very much reduced threat of malware. I have contemplated going back to PC's but I always resist.
When Apple moved to Intel, I was stationed on a remote Island in the Pacific, and on a week long R&R in Hawaii, I bought one of the latest Macs. There had been much talk of the compiler being superb and how it would run your favourite apps while the software houses updated. Of course it didn't run complex audio software very well at all.
When I responded to the OP, his scenario sounded very familiar to me, and I wanted to draw his attention to the downside of what he was proposing. He did ask the question after all. The main points are firstly, 64 bit software only, suddenly and immediately. This might not be a problem, I merely pointed it out. Secondly the impending arrival of non-Intel processors. Which will have no effect whatsoever on his use of existing software on his existing machine, but it will affect the re-sale value of the machine. If that is not an issue, then no problem. Again I merely point it out.
My choice of words "Nothing will work unless its 64 bit and Catalina Compliant" might sound a bit dramatic but hey we are all in the entertainment business here :) Nevertheless the statement is perfectly factual.
Finally, Bangkok is a vibrant modern extremely well appointed and huge city with probably the newest most comprehensive Apple store on the planet. There is nothing I couldn't get in Apples line of hardware there (it's more expensive due to the import tariffs here but that's by the way) and in addition there are hundreds of Apple Studio stores all over the country. I have been a bit unlucky thats all, it's not due to dodgy shops. I confess to being a bit clueless about the finer points of OSX and the workings of the computers themselves, which hasn't helped. Since I got the lowdown on Uninterruptible Power Supplies from Hugh and others I have had no problems with the local power.
I am retired now, and I have lots of time to get to grips with my stuff. I have 48 tracks of Nyquist RADAR Studios, connected to a Midas Verona 480, and UAD "outboard" which is really in software, and I'm still using the two Beyerdynamic MDC100's connected to the multiplex thingy which I bought on the strength of a Hugh Robjohns review in SOS way back in the dark ages.
Best of luck to the OP, for sure he will enjoy the Mac experience.
The only excuse we have for making music in the first place is to make it differently..vis-a-vis our own difference (Glenn Gould)