It was established that the Force is a constant, distributed amongst all Jedi. The fewer Jedi there are, the more powerful each becomes because they have access to a greater portion of the whole.
>>iainme+(OP)
I believe what the parent comment meant was that, when someone dies he/she will become "one with the force" (cosmic force) and will bring additional power to the force (living force). I forgot what comic or series I read or watched that from but that's how it worked if you watched all Star Wars, including the stupid animated ones.
>>lawgim+2m
No, I meant what I said, it was one of the things they changed about the way the force worked in the new movies, but I'll be damned if I can actually find a source to prove it. So there's a chance I Mandela Effected myself but I'd swear it was a thing.
Even then, assuming I'm full of shit... she's a Palpatine. Secret legendary bloodline. I hate it but it still works in universe.
>>lawgim+2m
They established this in Episode 1, when Qui-Gon talks about becoming "one with the force". It was implied to tie in with the Originals when the holograms of Obi-Wan and Anakin show up in the ending of ROTJ.
I'm not sure what changed with the fewer Force users thing in the new series shrug.