I'm waiting on a good answer to the end-of-life disposal issue. I've only heard a vague "it's worth it overall", but I'd rather not see the mined minerals be lost.
Particular policy isn't going to be a global discussion, it's going to be jurisdiction-by-jurisdiction, and will likely follow similar lines to all recycling discussion. PV cells aren't made of especially rare minerals, so it's not likely to be a high-priority issue. That's perhaps disappointing, but given that's our default for pretty much all recycling, it's no great reason to worry about one particular technology.
[1] https://www.greenmatch.co.uk/blog/2017/10/the-opportunities-...