I have been on SmartThings for the past few years at our previous house, and things were fine since there were only a few automations handled with the Smart lighting app (e.g. turn on hall lights when doors open, voice control through alexa for various lights, etc.).
We moved to a new house and plans have changed (and my V2 hub died...replaced with a V3).
The plan is to replace all recessed lighting in the kitchen/breakfast rooms with Sylvania Smart+ RGBW Zigbee recessed lights (already purchased, just need to retrofit the existing cans). The kitchen has 4-way switches (3 locations), which have now been replaced with Inovelli Red-series switches for scene control (plan is to disable the internal relays and rely on scenes to turn on/off the recessed lights). The current dumb lights are hooked up to the main switch, and the aux switches act as scene buttons to turn the main switch on/off through ST Smartapp (I didn't like how direct association behaved)
ST service went down the other day and my wife freaked out because nothing worked right and was very wonky, hence my decision to go to Hubitat. Also, she commented on how the lights are too slow to respond when controlling from the aux (scene) switches.
Once the full switch is made to Hubitat and the smart recessed lights, should I expect a speed increase when turning lights on/off using scene controls? Currently, it takes about 1-1/2 seconds for things to respond after a button press for lights to go on or off, and even shaving off the 1/2 second would do wonders.