My only advice is Don't let perfect be the enemy of good
@hajime I've seen posts from you for over 6 years obsessing, agonizing and debating every little detail on a given laptop. You've been struggling with getting a computer since before 2020, Every laptop has distinct and maybe even unique advantages and disadvantages. The idiom "Can't see the forest for the trees" Fits in that if you focus on so much of the small nits and imperfections, you'll never buy a laptop or never be content. They're just tools to get the job done.
If you've been using an ARM based Mac already and it has largely did the job you required of it, then your M5 is a great step up, just open the machine and use it.