Henning wrote: The manufacturer of LPP’s switches R.E. Beverley (see here) also offers laser spark gap switches (see specs).
I think Eric and team have a good reason not to use them, be it costs or complicated laser beam setup. Another reason could be, that with every shot the optical system gets misaligned, because of the whole construct moving with the applied force.
On a quick skim thru the specs, I note that they have a max firing rate around 100 Hz, and an expected life from 5-20,000 shots. This would be a minute at most of FF operation.