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Raspberry Pi 5 revealed, and it should satisfy your need for speed
(www.theregister.com)
This is a most excellent place for technology news and articles.
No it didn't. The stock problem will be considered "cleared up" when you can wander into a Microcenter any day of the week and grab one, and that is very much not the case yet. At my local Microcenter, they're still selling out within hours of receiving a shipment (and they're only receiving like one shipment a month).
That mostly depends on the thoughts on profitability by the microcenter, not necessarily on general availability.
Sadly not so much on the CM4, which is what a lot of people are after these days.
Seem to be plenty of special-purpose bring-your-own-Pi carrier boards (like the Home Assistant "Yellow") that people haven't been able to get CM4s for in going on a year at this point.