They're one of the least reliable companies out there. Every other product gets cancelled within 2 years, and they're constantly making major redesigns for no reason.
It pains me to defend a corpo, but calling Google unreliable for their "fling shit and see what sticks" methodology for developing new products is inaccurate. Google/Alphabet is actually one of the most reliable corpos in the tech sphere, relatively-speaking, if you analyze their core products throughout the years.
Yes, it does feel like Google retires projects faster than they instantiate them. But that's by design. The core product (selling advertising on SERPs/YouTube/AdWords/etc) is about as reliable as it gets, and that's where they get their money.
Their core products meaning search and email, sure. Everything else is on the chopping block and randomly changes all the time.
Remember when they bought Nest and literally bricked everyone's thermostats? Tasks / reminders / whatever gets completely reworked every other year. They went through a chat phase where they released half a dozen different, incompatible chat apps, and also wrote a chat sub-system into every other app they had.
They're lunatics. If all they want to do is search and email, just do that, don't waste time and consumer patience branching out into all these random things they'll drop support for in two years.