<250g DJI drones tend to be released yearly, but they reached the point of diminishing returns with the
Mini 3 Pro.
Whenever the Mini 5 comes out it won't do anything that the 3 or the 4 can't.
When tech reaches the point of diminishing returns, there's no point in waiting anymore. I changed my Canon 6D for a Canon R6 (10 years appart or so) and you can't see any difference even pixel peeping. You need to force the shadows up on the DNGs to see anything different and even then the differences are negligible if you want to print 20x25 or even worst, if you want to publish it online.
R5 vs the recent R5Mk II... two drops of water, it's completely impossible to tell the difference.
What has improved in the later years in hand held photography is the autofocus; the AF to the eye is God.
Drones are on the same league now, The Mavic 4 won't be much of a change compared to the current
M3.
I'm "waiting" for the
M4 because I already have an
M3 that I fly every day, but if you don't have a drone just pick the
Mini 4, the
Mini 3, the
Mini 2 4K or however it is called now, or even the
Neo, there are plenty of drones to choose.