The PT still always had a large amount fans and apologists and I say that as someone who really has to pick and choose what parts I can enjoy. The Clone Wars brought in new kids and reinforced existing staunch supporters of the PT. Also the PT wasn't malicious towards the OT, so it's sins are much easier to forgive.
On the contrary the ST has very few people left who give a damn. Just a few Twilight loving Reylos and shippers left. Their Twitter "fans" have mostly moved on to the next franchise to hijack and the next person to cancel. There won't be any such revival here.
That could just mean it takes longer to get its fanbase - and obviously that would not have been Disney's ideal scenario. But as long as Star Wars continues to be a thing (which so far it does, albeit on TV for now) there will always be opportunities for new fans to come along with no baggage - no vested interests in hating something that previous generations hated, no determination to insist that the thing they hate is objectively worse than the thing that the generation before them had hated and so on. That's essentially what's going on in fandom today - the Battle of What to Hate More
edit - I liked the sound of that so much I've decided to capitalize the first letters