W10 SAC or LTSC versus SPE/M365 suite

hi

I'm currently doing an analysis for a new workplace project.

the customer has an SPE E3 license and wants to go to W10.

the question came if they could use LTSC build instead of SAC build

reasoning behind it is that, since they are global, they expect upcoming mergers or even splits and fear that this might impact the user too much if we decide to go for SAC.

if my info is correct I can't even use LTSC with the SPE suite, is that right or not?