Google would have absolutely no issue creating quality fitbit devices. Whether or not the market would be there for them to stay in long term, I don't know.
Sure, but they did come in and add real innovation to the product; for example, adding a secret microphone that wasn't disclosed to the customer.
Or those wonderful Android Watches, sorry wearOS, never mind, they aren't getting proper updates for ages now.
The Chromecast works well most of the time. The ways it fails is ridiculous.
I did have some issues recently with being unable to pair it with specific Samsung phones, but it's a combination of it getting old and I assume issues with Google killing software (I don't want your Google Home !).
In a way I have worse issues with my Pebble Time… which Google now owns, to my displeasure. (But it is probably more open, so I have better chances fixing the issues myself in the long term…)
EDIT - never mind, Asus made both of those
Asus did make both, but I'm not sure either was as good as you recall, sadly.
Seems to be a finished-ish enterprise product now.