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The list I gave was by no means a comprehensive list of technologies that couldn't be "future proofed" for, and while everything you wrote was opinion dressed as fact, I'll address two that I know to be factually incorrect for my usage:
Wrong, everything I wrote was based on my own personal experience and the modus operandi of my colleagues through the years working in professional environments (headquarters of several major Banks, Social Security Institutes, Insurance Companies, Federal Institutes, Public Transport, Energy Providers and 1 small company specialized in mobile app development for third parties).
Your two examples below qualify more as "everything you wrote was opinion dressed as fact"
"Unlocking your professional Mac by another electronical device is frowned up" So how do you unlock your Mac? A keyboard is an electronic device (wired or unwired) which can be remotely monitored via a key logger or interception of electrical signals. If someone is in the same office, it's very easy to glance over and see what the user is typing when they log in or unlock their Mac.
Unlocking my iMac with my Apple Watch has been a perfectly acceptable usage in my business, and more secure (and convenient) than typing in a password on a keyboard. When I have a sudden idea, it's nice to unlock the Mac without breaking my train of thought (even briefly) to type in a password. I'm looking forward to the added security and convenience of Touch ID, which is secure enough to authorize financial transactions.
Keyloggers are installed on the pc or mac, not on the keyboard itself.
Also the majority of keyboards that I have encountered which were provided by a company for their employees still have a cable.
"Sidecar...really? Maybe for a consumer or a prosumer when they are working in a hotelroom" I guess you've never heard of a Wacom tablet, or seen the price tag. Sidecar lets photo editors run the full version of Photoshop on the Mac and use the Apple Pencil to retouch images on the iPad's screen, or create an image from scratch. Working for hours is much nicer when you can sit back in your chair and work naturally as with a paper and pencil or canvas and a brush.
Again, the idea of "future proofing" assumes you know everything that's coming to the Mac and to your own workflow, and ignores the potential for drastic performance gains for the M series within the next couple of years.
Professionals that need a Wacom tablet, buy a Wacom tablet (if they are freelancers) or get one provided by their employer.
It's the same with software. I've never seen a fulltime developer work with VSCode as their prime IDE, they would buy or get a license for Visual Studio. Or use Notepad++and Kdiff3 for XML manipulations, because there would be XmlSpy licenses available.
Professionals want tried and true solutions (hardware and software), if you are an individual (Freelancer working in BYOD companies) or an employee, the hardware and software really doesn't cost much at all compared with daily rate a person costs.
It takes me personal about a week in earning my MBP with legal software licenses, which is nothing compared to the hours I use them.
No, like I said before, future proofing means that I know that there are rules to be followed concerning architecture within 1 type of eco-system, so software (OS and applications) written for the M5 will run on a powerful M1.
At this moment we don't have enough data to know if the release rate of newer Silicon processors will be 12 months or 18 months. So it could be that your M1 lasts 6 years or 9 years before you need to buy the M6.