Wasn’t this case pretty much before?

The limits are 100 workers on free and 500 on paid.

And if need more then you can always go their platform which supports tenancy.

As long as you have a cronjob or similar to clean up the cost of having per PR preview is pretty much zero.

unless you have 500 PR's a day =)

On the other hand, we already use regular CF builds for frontend previews, but that doesnt solve a fullstack PR preview much