That’s only true if they can be coalesced. Even with RPKI an intermediate transit router can path length flap 100,000 routes every 30 second interval.
Depending on the RA interval alone is negligence and if you encountered a small ISP that isn’t dampening your updates directly, their peering session is at risk with any of the major transit providers.
Route dampening guardrails were super common 7 years ago and there isn’t any technological development that fixes what they did so I highly doubt they fell out of favor.
