I actually think the Chiefs will be very good for a long time. There is definitely a chance they will be "the team of the decade" for the 2020s. If you had to rank the teams with that potential would you put anyone above them?
That said, as we know it is very hard to win multiple titles (and let's be clear, you need 3 in 6 years, let's say, to earn the "Dynasty" label, but feel free to quibble with that).
The Patriots were the best team overall from 2005 to 2013 with the best QB in the league (give or take depending on the season) but won 0 titles. Often when we lost it was due to one play going wrong (06, 07, 11) or an injury (08 Brady, 11 Gronk). The Chiefs could be the best team of the 2020s but have those things go wrong too. As other people have said you also have to master the cap, not have too much dead $ on it, probably stop giving out such high contracts to your WRs (Watkins, LOL).
It's freaking HARD to have a sustained run. The question is will KC be like the Pats starting in 01 or like the Seahawks in the 2010s, where you're in it every year but often not good enough to win it all.
Frank Clark can talk all he wants but I say there's about a 25% chance that the Chiefs win two more titles in the next five years and earn the dynasty label. Also if the Pats win next year then we extend our current dynasty (4 out of 7) and the Chiefs win doesn't count; they have to start over because by definition you can't have overlapping dynasties