They may cut the extent of a free offering, but I suppose they won't drop it. An ability to make a quick proof of concept, to just try something and play with it, is very important for bringing in paying customers. People tend to buy with more confidence things they already know and comfortable with. People tend to pay for things that are widely known, with tons of examples and explanations online; free services generate much more of these.
That might be true but it really depends how many can convert. Recently Heroku dropped their free tier as well as Fly.io having a credit card only free trial in order to deter scammers.
I don't disagree with you, but I do think the economics of static sites are pretty different which may keep the free tiers around for longer. Even if it's "free for sites under 1MB", which would cover a lot of sites.
