That's just the way it is with technology - there will always be something better and often for the same price or cheaper on the horizon. I don't think it is a poor decision on your part - you bought what you wanted/needed at the time.That's the issue. Sure, It would be nice to have another zoom lens closer than the 7x, but I just feel more cheated than anything else. I'm mad at myself and this just validates another poor decision on my part. grrr..
When I bought my Mavic 3, less than a month later DJI had their spring sale and the price was reduced CAN$150 and it pretty much stayed that way. Sure, I would have liked to have got the CAN$150 discount off my Mavic 3 but if I would have waited I would not have had much time to fly it before a trip we took to Newfoundland, so at the time it was the right choice for me. I later bought the RC Pro to go with my M3 and then about a month or so later DJI announced the Mini 3 Pro with the DJI RC with the built in screen. The DJI RC with screen was not available as a stand-alone unit for awhile after the initial release of the Mini 3 Pro, but I was second guessing myself since I had just paid so much for the RC Pro. In retrospect the RC Pro was also the right choice for me. The lesson here is if you are waiting for the next best thing, you are going to be waiting forever because there is always going to be a next best thing just around the corner.
With regard to the Mavic 3 Pro, I would love to have the additional 3X Tele as I use the 7X Tele on my existing Mavic 3 extensively, BUT I am only a hobbyist photographer and do not sell my images. At this time, I cannot justify buying another expensive drone for my use case - maybe in the future - if I win the lottery!