I've had a few P60Ls, and wish I'd kept the one that came with my C2L instead of selling it.
It fits the SC1 spare carrier, which no other drop-in I'm aware of does, and while it may not be the hottest thing going, it would make an inexpensive backup.
LEDs fail, circuits fail, connections fail...whatever you put in there, no matter who makes it, has the potential for failure, so having a spare on hand is never a bad thing.
Also, if you continue in this hobby, at some point in time or another, you may end up in a situation like me, with more hosts than you have drop-ins. After whittling down my accumulation to a bare minimum, I'm left with one full size P60 host, some accessories, a need for ONE extra light, and no more drop-ins, since both my remaining Malkoffs are on E series bodies in VME bezels. It would be nice to have
something in there, but I'm not going to go out and buy anything just to have temporarily while waiting for stuff that should be released soon. Should have kept that last P60L.
For the clicky, you can get a SF Z58, or mod the stock Z41-HA tailcap with this(scroll down to switch upgrade kit):
https://www.candlepowerforums.com/threads/248609
The adaptor uses the McClicky switch, which is easily replaced, so you can have a spare or two in case of a failure(yeah, they also have that potential). Switch boots wear out, too, so if you get one, might as well get a couple extras of those. I'm not high about the switch button protruding a little more, and don't prefer the feel of my McClickies over the Z58 on my C2, but you can upgrade your stock switch, and have a couple of extra switches and boots for about what the SF clickie tailcap will cost. Pretty good deal...