If you want to carry on the analogy, Google has a debit card that only works at Google and unlike Walmart it won't accept competitors coupons and all the stuff sold in store isn't sold anywhere else. You also can't take it apart, and only people with Google debit cards can see any of it when it leaves the store.

Hangouts is becoming a nightmare of a proprietary locked in mess that is destroying decades of progress in FOSS space towards open standards for communication. They are killing Jingle and XMPP by depreciating Talk, and they are now killing VNC. They may not have played nice together, and they may be painfully outdated, but it isn't an excuse to take your toys from the community sandbox, go home, and build yourself a space rocket in your back yard and fence it off, because very few people will pay to get in your back yard and will stay in the sandbox with Tonka Trucks.