On PC but a fairly new player as well, and when I saw SRV bays with 2 and 4 spaces I though it was meant for multi-crew.
I was really surprised to see post in the forums and Reddit about how multi-crew SRV was not possible; why would you ever carry more than 1 then?
Also, it would make multi-crew a lot more viable on those smaller ships with no room for ship launched fighters (the Keelback is so strange in that regard - SLF without at least a 2nd seat? But that is another subject.).
I read that the lack of SRV multi-crew is at least in part due to not having a good way to split rewards since the gains of ground exploration are usually in materials rather than credits. That and how it is deployed; as in, how does a crew member join you if you're not in the ship or if you have put it in orbit for safety? And I also saw a mention that the code behind SRVs was built before multi-crew was a thing and would need major remodeling for it to work.
No matter the reason, it seems like it's not as simple as flipping a switch. I do hope that the devs won't give up completely on it because of this though, as I think multi-crew is an amazing and unique experience that needs more support in different areas (exploration, scanning, SRV, availability of options on smaller ships, etc.).
