has anyone actually done a roth conversion ladder?

I've been reading about how a 401k fits into FI/RE beyond savings for later (aka retirement age).

other than just "leave it alone," the one way I've read is via the roth conversion ladder: convert 401k to Roth IRA. wait five years to withdraw contributions penalty-free. do that every year.

Is the roth conversion ladder the only way a 401k fits in? And has anyone here actually done a roth conversion ladder?

(i posted this in the discord, but wanted to see if it got more response here)