Exactly. I've never considered voice assistants because I don't want recordings of me or my family being used for who knows what.

I've just looked over the docs. I'll probably be playing with this very soon.

Interestingly the storage on my phone was used up and Google Keyboard kept on crashing, so I had to use voice for one whole night.

Having run into similar problems multiple times, the solution is to clear cache on an app. If, like me, sorting your apps by storage usage never actually completes[1], browsers are a good thing to check first[2]; Unity games are a good second (those analytics pile up, even if the app is firewalled). If you're rooted, check the analytics in Chrome's private data folder, it was taking up 1.5gb on my tablet last time (not sure if this is cleared when you clear cache or not)

If the primary issue is the same as me, that you download too much crap without paying attention to available storage, just use the terminal emulator to create a 25-100mb file you can delete when necessary.

[1] storage ️ internal ️ apps [2] If you use PWAs to cache data and avoid high data bills, keep in mind that clearing browser cache clears PWA cache as well (my most-used PWAs are for hn and xkcd)