Point 3, the Dems really need to stop with this idea of it being someone's "turn". Personally, I think that hurt them in 2016 with it being Hillary's "turn".
Hillary did seem to me to be the best Dem candidate, though, and by a far margin. I did not personally like her, at all. I could not stand to listen to her at campaignb events, for example. (I thought she was fine in one on one interviews, but her voice became shrill and strained on stage, a real handicap.)
The problem with Bloomberg is he didn't jump in at the beginning. If he were to somehow get the Dem nom now, it absolutely looks like he bought his way in. I think that would disillusion a lot of people.
It might, for a time. Especially the Bernie folks who are more actual Sanders fans than they are about just beating Trump. But I have to think anyone that motivated is going to vote, for sure, and they are never voting for Trump. So while it might crater his numbers for a bit, I do think it would ramp up fairly quickly.
I can tell you that here in Florida, among those I talk to, he is getting a serious look, and primarily for two reasons. First, he seems willing to take on the NRA. Long overdue, imo. Second, he is willing to flat out say it when Trump lies, and not politely. No cutesy roll of the eyes, ah he's at it again. No. He will say Trump is a liar, sternly and with warning. Which is needed.
JMO, but the Dems need to put work in finding an actual viable candidate for 2024. I think by focusing on an impeachment that was always doomed to fail, they hurt themselves by not finding such a candidate for 2020. And who knows, the economy may have prevented anyone from beating Trump, but the Dema have done themselves no favors with the strategy they chose.
The campaign began long before impeachment. I don't think impeachment altered who would run at all. And I do not buy that it will hurt them in November. The only people really offended by it are Trump cult members who will vote for him no matter what, anyway. I do agree that the ineptitude of Iowa hurt a bit, but I think that will fade in time.
Key for any Dem nominee is get out the vote. Get volunteers picking up people and taking them to the polls. My gosh, such a mobilization effort in South Florida could easily flip the state, and its sizeable electoral votes.