It seems that what we know is that you can definitely get covid even if recently vaccinated, just like you can get covid even if you recently had covid. However, even a dated vaccination seems to do a decent job of reducing the chances that you will die from covid or get long covid. The strongest effect seems to wane quite a bit after 6 months (or sooner).
By the time i got covid, I had had 5 vaccinations, but it had been about 7 months since my last shot. My experience was sort of flu-like, with high fever lasting a couple days, and night sweats that lasted past the fever. A cough that was not the worst cough I’ve had, and it lasted a couple weeks. The biggest annoyance was my throat, which felt like i swallowed crushed glass. The long term effect is the detached vitreous in my eye from the coughing, but perhaps it would have detached for some other reason eventually. I’ll never know, but I believe if I hadn’t had all those vaccinations then things would be a lot worse.
I got my 6th shot about 3 months after getting over Covid, and I’d happily take the vaccine twice a year if they’d let me. I have no side effects from the shot other than slightly elevated blood pressure for two days, and a slight ache in the arm, and the potential worse covid experience ain’t worth it. Hell, my sister got COVID very early in 2020 and has terrible long covid symptoms to this day, including random spurts of extremely high heart rate, extreme fatigue, swelling ankles, etc. If a harmless shot will prevent that, why not take it?