@imsop What do you think about this proposal?
https://externals.io/message/130816#130857

I like the idea of having slow reified generics with ability to erase them.
I use SA on my projects, but when I hop on other projects what don't use it it's not worth to setting up SA just to have generics. And my colleagues what don't care about SA will still get errors when misusing code with generics.

For low traffic sites you can even use reified in prod, it's not like PHP is a bottleneck most of the time