Its the direction mobile computers are going. Its not happening so fast in the windows world but its happening there too and its not like apples laptops haven't been essentially locked down for 4 years already. I have no idea why anyone expected this release to be any different. If you don't like that in apples computers then move to someone else you are clearly OS agnostic, just accept that this may be your last user upgradeable notebook it may well be the case.
Real "professionals" have a capital replacement budget for all essential equipment by the way. Any pro, in any field, worth their salt can replace any equipment they need at the drop of a hat, that is what being professional is all about being prepared for any eventuality and having the means to fulfil your contract whatever the hiccups or needs of the job.
Spoken like a master apologist without a clue. The reality of being a pro is that it's a cutthroat world. Sometimes you have to bid so low just to get a job that you barely make a profit. Sometimes you don't make a profit at all, but you do it anyway because you need the credit for your reel. The last thing you need is to have a drive fail in the middle of a job and have to fork over a pile of cash just to get rolling again. If a drive fails, you need to be able to swap a drive and be up and running again 20 minutes later. That's why to call these things "pro" is so absurd. They're not for pros. They're for prosumers. They're great prosumer machines, but a true pro machine would allow drives to be swapped, RAM to be upgraded, batteries to be replaced and so on.