My biggest issue with WFH is that my conversation wit / debating skills are degrading.

When I was younger I debated and sparred a lot in school. Then it was in the office, and afterwork drinks.

 How can I hone that skill now, do you guys have tips?

Building https://getmocha.com // creator of the https://blockchainsmokers.xyz

Isn't that what twitter is for?

(Or I guess farcaster if you want more highbrow conversation / debate)

On the contrary, I think twitter encourages snappy one liners, not thoughtfully constructed arguments.
It leads to over simplification and polarization, it's the worst kind of arguing 😓

I think that actually depends on who you engage with. Also, need to get deep into multi-round conversations with the same person, so you get out of "public performance" mode and into "actual discussion" mode.

I feel like I've had good results (before twitter became unusable for me due to spammers)

I think Twitter Spaces can be a good place to have some good debates if you surround yourself with the right crowd.