Other people have covered the reasons pretty clearly.
But to add some color I’m old enough that you couldn’t make adjustments to software with an internet up date.
If there was a problem, and there always is, you’d just be stuck with it, possibly forever or at least until they could get new disks on the shelves, which would could be months to years.
If the software I spent $200 on , before subscriptions became the norm, had some major issue, oh well. Can’t return it.
Constant updates is a good problem to have.
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