I use Hive heating and sensors, Smartthings sensors, Yale Conexis lock, Ring DB Pro, Echo Show 10, Show 8, Echo plus, Echo, Echo dot 3rd gen and 2nd gen and the Fire cube for the TV, about 40-50 devices, apps in use Smartthings, Smart Life, Meross (good plugs etc works withs smartthings too), Ewelink, Ring, Hive. Alexa has a good few routines setup, all my lights are wifi, some switches, and a good few plugs, also the Logitech elite remote. Its all abit mis matched but it works, i cna control my heating or unlock my door from anywhere, actually i have tha auto unlock for 3 minutes when i get near home, saves getting the phone or fob out
My home built sheild is on a smart plug, it auto turns off sunset to sunrise, i can also manually tell lexy to do it, If i open the back door or the side gate, the lobby and lean to lights come on as do 4 LED floodlights.
I have a fair bit of smart home stuff that makes my life a bit easier due to my bad back, plus i can ask lexy what my stations conditions are etc, i did make a skill for my station but ive shut that down due to Amazon changing stuff that breaks it, i may visit it again sometime.
I also use actiontiles and FullyKiosk
I would like some new blinds for the front and have those automated but its the funding, even more so nowadays : (
EDIT: I forgot about the Echo Connect for my landline and Echo Auto for the car. I also use IFTTT too, I used to use stringyfy, that was great till Apple bought them out and closed it to the public...