And that’s great that it’s worked for you - but for a majority of tables, especially those that only play 5e, it can be a challenge to adapt to another system. There is a tendency to assume things work the same that needs to be carefully picked apart, and one of these things is the split between individual power and party power on the player side. On the GM side, it’s the tendency to be fast and loose with encounter balancing.

I’ve seen a lot of tables try to start playing PF2e carrying over from 5e and if their heart isn’t in it with the notion of trying an altogether new, different system (rather than just “D&D but…”) then it tends to end pretty disastrously - GMs homebrewing right out the gate in ways that make the game hard-to-impossible to enjoy or building insanely difficult encounters, players building their character exclusively for individual synergy without thinking of the party and showing a lack of understanding of using skill actions to assist each other, or a lack of understanding of how to manipulate the action economy of the enemy.

Any one of these things individually is something that can be slowly learned out of with time, but a lot of times I see these happen at the same time and you end up with lopsided parties that don’t know how to assist each other against insanely difficult encounters and it’s just TPK after TPK which leaves people with a bad taste and perception of the system, when the system itself isn’t at fault here.

I see that you moderate the TTRPGs community over at your instance (which I’ve greatly enjoyed btw) so I can only assume you have experience with a lot of systems, in which case I can understand why it seems a lot simpler to you. But for tables where people have only played 5e, or have played other systems but in recent memory have only played 5e (I don’t know which OP’s is, but at the very least the latter given they’ve played 5e the last 3 years) there can be a lot of friction.

Additionally, I wasn’t recommending the characters be carried over except at level 1 or abruptly ending the campaign when I said ‘start over’. I was recommending “finish your campaign in 5e first and then start over in PF2e with fresh eyes.” Characters in PF2e are very different and people tend to have built expectations of what they can and can’t do by now or a specific mix of mechanic and flavor that will be different in PF2e coming from 5e. Some people are okay with that, some really aren’t. But everyone is okay with starting a new game, so finishing up your ongoing one rather than swapping halfway is the safe route.

What works for a table might not work for another, and the perspective I got of OP’s table is that they would benefit from starting over once their 5e campaign finished.

EDIT: Especially given that OP was already 1-2 weeks from finishing his campaign, wrapping it up was the most sensible thing.