If enough people kick up a stink about it, Unity will almost certainly change course.
Waves Audio, who produce a vast number of very popular plugins for music production software, recently announced a change in their pricing model in that you could no longer buy a single plugin for a one-off cost (which would also come with a year's updates - you'd have to then buy an update plan if you wanted updates beyond the first year from purchase). Rather, to use any Waves plugins you didn't already own, you would have to go for their monthly subscription of $25 per month, which would come with every single plugin, but if you stopped paying you'd lose access to all the plugins you didn't already have a perpetual licence for.
It was an absolute PR disaster for Waves. There was a massive stink kicked up. Many people swore to never use a Waves product ever again, even the ones they already owned a perpetual licence for.
Waves did a complete u-turn and within days of announcing the switch to the subscription-only model, they confirmed they'd be bringing back the option to buy perpetual licences and have the subscription thing as an option for those who wanted it.
https://musictech.com/news/industry/waves-subscription-only-u-turn-licenses/
I wouldn't be surprised to see some kind of similar u-turn from Unity if enough people kick up a big enough stink.