I am using a Microsoft Natural Ergonomic keyboard for at least 6 years. It is a membrane, but I don't feel a big difference with mechs. Moreover, with its negative tilt it makes wrists position and bend much more comfortable.

It weared off a bit now, and I found out it is out of production, so I bought several units from outdated discounted stock. I hope those will last until Elon Musk figured out direct brain interface.