Considering that my 17 year old MacBook only needed a new battery in the process, I can say that they're dependable machines (also ~20 Macs around me confirms this little statistic of mine).

On the simulation performance, you came to the right place, because I'll be developing a BEM code for material simulation. I can test it on both M series and on a cluster and see how big the gap is. Intel based Macs were pretty on par with their server siblings. I expect to be able extract similar performance from M based systems with some tight coding.

If you believe that Asahi's changes won't distilled to mainstream Linux, you're mistaken. Marcan might have fought with the kernel devs, but somebody will carry these changes in another form sooner or later. Macs wont't be Asahi or MacOS only systems for long. I think you can understand this better than me, because as far as I understand, we're using these things called computers for a similar amount of time.

BTW, you're citing Thinkpads and Z-Books which are the two machine classes which can claim some parity with MacBooks. They are the same class machines basically, so you have some bias in your views. This is what I cited as "I have to beg the local distributors to...". So getting an equivalent Z-Book or Thinkpad is not 10x harder, but at least 3x more expensive for a similar configuration.