I do not state a percentage because long covid is still being characterized. Without a standard case definition, it is hard to determine exact numbers. I've seen statements that long Covid afflicts up to 40% of Covid survivors, but, again, it's hard to define. Variability in estimates no doubt is related to the lack of a standard definition compounded by the fact that some people's symptoms resolve after several months and others still have symptoms two years later. So, hard to say.
However, for your reading enjoyment:
Nearly One in Five American Adults Who Have Had COVID-19 Still Have “Long COVID”
Why unconvincing? Some assertions speak: "Nearly One in Five American Adults Who Have Had COVID-19 Still Have “Long COVID,” Page last reviewed: June 22, 2022.
Surveying our family and rather large group of friends, we don't replicate that percentage. In our rather large circle, we know none. For this your circle of family and friends might make up the difference for the calculation of such an average? Have you forty percent of your circle to offset out zero percent?
Additionally, given that "Warp Speed" forward, and with about 80 percent having participated in some of the SARS CoV2 mRNA injections, whether first doses or succeeding boosters, neither of the other CDC articles even mention "vaccine" as a part of the study which could have been part of the whole.
I mention this as we know only two family members who tested positive, both were inoculated beforehand, and one had rebounds to include the so-called Paxlovid rebound. More prominent stories include public figures experiencing reinfection after one or more injections, and several "fully boosted." To not mention this in a study about Covid and long Covid seems methodologically unsound.
As you say, "it is hard to determine exact numbers." I agree with the general tone, "So, hard to say."
The mortality rate calculation for this entire 3 1/2 years is easy to do, according to which ever sources with which one agrees, and it still reckons out to something less than 1/10th of one percent over these last years of media frenzy.
I think I shall look around the topic of "long Covid" a bit more. I imagine you shall as well. Thanks again for the links.