Here's an interesting statistic.
SpaceX flew Falcon 9 96 times in 2023. Only three of those flights used a new booster.
Ok, that overstates the reusability a little, as they added four new boosters in 2002 (February, May, October, and November) for 60 launches. All four of those 2022 boosters are still in use with their most recent flights on May 22 or more recently.
Two new boosters were added to the fleet in 2021 and are still in use.
Three boosters first used in November 2020 are still in use (most recent flights June 8 (21 flights), June 27 (22 flights), May 14 (18 flights)).
The booster that was lost at sea on the way back to port after a successful landing on December 23 last year was first used in May 2020 and, if not lost, would be the oldest still active. Another with first flight in June 2020 was deliberately expended on its 20th flight in April 2024.
Two new boosters have had first flights (so far) in 2024.
So they have made a total of 16 Falcon 9 boosters in 2020, 2021, 2022, 2023, and 2024. With zero launch and zero landing failures, and just the one loss in a storm at sea, and one deliberately expended to launch a heavier payload.
There have been 280 Falcon 9 flights from January 2020 until today.
(some flights in that time used older boosters but, equally, the current active fleet of still has a lot of life left in it)