I migrated from HomeKit to matter the moment I could once HomeKit and the Hue bridge supported it, I actually found matter to be a little more responsive overall, and it seems I've been on mater for about two years looking at when the Hue bridge supported it.
In those two years, my Hue lights have been rock solid with HomeKit via matter, as for that popcorn effect, if I turn a ceiling light on or off that has three to six lights in a single group via the Hue app itself then the bulbs work together immediately in sync, doing the same thing via HomeKit with matter they do respond very quickly, but they do it one by one, same if you turn them off. Could be a matter issue, HomeKit's fault, or maybe just the slow bridge when using matter.
Not really an issue, but it will be interesting to see how the new pro bridge handles it via HomeKit and matter, will be interesting to see if it's the same or more responsive.