I think it is fair to say that the CL community is divided on whether or not relying on TCO is idiomatic.
I prefer to write my state-machines as transitioning with tail-calls, and I do get called for it. It's relatively easy to switch something written in that manner to using a loop with a trampoline, so I do so when my collaborators request it.
I wouldn't argue about things that are a matter of taste normally, except that I've had the experience where I've turned down optimizer settings in order to debug some code better and then the had stack overflow.