I swapped from a lifetime of android, to a 15PM im not missing much nowadays. The only major feature id say is split screen but PiP does the trick most of the time for that, while not as perfect that and the keyboard being a bit slower would be the only "downgrades" i could come up with in a month of use.
The list of things that have worked better is a lot longer, the bt and cellular modem is miles better than my old pixel 6 pro, the high refresh rate screen actually delivers high framerates more of the time and the apple intergration is so much more cohesive than googles hodge podge of integration