There is no rationale for Microsoft to force customers to upgrade anything ever. It's our business, not theirs. OK, stop support and don't update versions, but that's our risk to accept or not accept. I must be able to maintain the software on my business' computers in the best way that helps my business succeed. Operating systems are too critical to the proper operation of applications and peripherals to change continuously. If we're paying for an "Enterprise" version of Windows with SCCM, then we should be able to manage our configurations to comply with our requirements, not Microsoft. We must have all bloatware removed and control handed to our IT departments. Nothing, and I mean NOTHING, should ever automatically install on the equipment WE own without our express approval.
To be clear, we do upgrade before each channel expires but sometimes one can't do that for every system and we certainly don't want users going to Windows Update and upgrading out of order. It is an onerous task for businesses to waste resources and lose productivity by migrating functional computers to LTSC just because Microsoft refuses to allow us to turn off SAC. There is just no good reason for this meddling in our affairs.