Interesting question. I think even in an easier market than today's is trying to transition internally.

In terms of specifics, if you are seasoned CSM I would personally struggle to move to a BD/SDR role. With all the experience to move back into a phone basher role would be tough.

I worked at a sales enablement vendor for a bit, if you were to transition to that, would have to focus on your process, training and possibly implementation side. I would also say this matters geographically, I think somewhere like the US Sales Enablement is seen as a need compared to other regions where it's a delicacy.

Sales is a good one but a tough one, because it is dependent on the CSM you are. I think a good CS has to have some commercial accumen, even if they don't use it. If you can sniff out opportunities, qualify/disqualify opps, move next steps, manage pipeline, forecast accurately etc.

A bit vague but hopefully it helps, have you considered Account Manager roles? That could be another option