Timelines:
1. Google voice gains voicemail functionality. Gains SMS functionality. Gains "make phone call" functionality.
2. Google Voice deprecated in favor of Hangouts. Hangouts gains SMS functionality. Gains "make phone call" functionality." Gains "receive phone call" functionality.
3. Google Hangouts "receive phone call" functionality removed.
4. Google voice gets a makeover. No new functionality, better UI though.
5. Google Hangouts SMS functionality deprecated.
6. Allo released. Duo released. Nobody is sure why.
7. Google Hangouts converted to "enterprise app."
8. Google Hangouts deprecated in favor of Google Hangouts Chat?
Other lost Google Products:
1. Gmail -> Inbox? Nobody knows
2. CAPTCHA
3. Google Site search
4. Picasa -> Converted to Google Photos (not so bad really)
5. Helpouts
6. Moderator (used by President Obama!!!)
7. Hello
8. Wave
9. Meebo -> Plus
Fucks sake even Google Maps Engine and Google Spaces was discontinued lol.
Here's a fun article: https://en.wikipedia.org/wiki/List_of_Google_products#Discon...
Look at that discontinued list and look at the business services that have been discontinued, can you find any? Can you find more than 5? Look at G-Suite + GCP (Google's business offerings) and tell me how many there are. There are dozens. Many of which have been around for 10+ years (Email, Docs, Sheets, Analytics). So if I'm a business, making a business decision about a new business service from Google it's an incredibly safe bet that this service will be around for the long hall.
You can point to consumer services to try and discount that... but you'd be wrong to, and I think you know that.
Much better imho for a growing business to use their own in-house tools that they can mold how they want and that won't change UNLESS they want them to.
If you're spending 100K in integrations you think building an entire service, or suite of services is going to be LESS than that? Now take into consideration opportunity costs. This is insane.
I'll be generous though and believe that you're talking about using open source solutions. That's a more viable option, but you still have to do integrations so the cost is effectively the same, probably more because Open Source solutions are typically far less polished.
And even Open Source projects change dramatically over their life. Everything changes. That's technology. Better to get better at dealing with change than try and hold the world still.
But then Google flipped us the bird and took their ball and went home. Their AMPification plans for email and my residual anger over screwing us over with XMPP was the straw that finally made me switch my vanity domain from Google to Fastmail.
EDIT: Every tech company seems to want to re-Compuserve us :-(
Apparently Google did allow broken (no tls) server side federation too - so they screwed us over twice - both on client and server.