As others have noted in the thread, it's virtually impossible to play long enough to get dice pools as large as main cast characters. Vader and Palpatine in particular might as well be in the Deities and Demigods section.
I've seen players into the 10d range, and my campaigns didn't run more than 6 months of weekly sessions. Now, my sessions were long, and CP awarded with that in mind... but also, my players almost never used CP for bonus dice. (and that's a 2e thing, while my longest were 1e).
With starting PCs, the most key example of appropriate use of a force point:
Party is raiding an ISD to free some rebel spies. OF COURSE, they get pinned down by 8 stormtroopers. The Young Jedi, who carried no blasters, still had 5d in it. He has one of the PCs with a blaster toss him one. Then, dropping a force point, does 8 shots, so -7d on everything, leaving him with 3d per stormtrooper at short range... Stormtroopers don't dodge well - 1d, typically - so he dropped most of the stormtroopers. Rest of the round was others mopping up the last few.
Next round, tosses it back to its owner, saying, "Just because I hate using them doesn't mean I can't. Now, Let's get out of here."
In my 2018 game, several PCs hit 8d in blaster. That ran about 5 months of weekly 1800-2200 sessions. Not a one of them spent CP for extra dice. Force points typically leads to action flurries instead of tall rolls.
Now, the 2e CP per session is based upon 2 sessions per adventure, and the following amounts (see 2.0 pp 46-47), essentially 15 points per 2 sessions. At that rate, a starting 5.0 skill can be raised quickly...
15 points to 6d, 18 more to 7d (total 33), 21 more to 8d (total 54) - readily achievable. That also ignores the reductions for obtaining training. Getting to 9d+0 is another 24 (total 78), and 10d+0 is another 27 (total 105 CP from start of 5d+0 for a signature skill.)
(5 for 5+1, 5 for 5+2, 5 for 6+0; 6 for 6+1, 6 for 6+2, 6 for 7d, and so on,)
105/15 is 7 advenutres, or about 14 sessions. At least, if the player is fixated on one skill. And I've seen that to the 8d level.
1e (see p 94) is about 2/3 the rate, less clear about adventure length intent, and many were treating adventures for a single session in the 7+ range (of a "15 per adventure at the very most")... but 1E also sucked points to beef up ships, too.