Exactly! Suppose you live for another 100 years. At the current rate, Google will be giving you the rest of your life with this for $300. You should just be hoping it remains this cheap.
My heartburn is Gmail was rolled out as near infinite storage. They told you archive, not delete. And for a while they had a ticker at the bottom showing your storage increasing over time. The cost is modest, but I feel Google isn't being true to the spirit of Gmail when they limit and charge for email storage.
Throwing my voice in I now pay. It is worth the price to keep high resolution photos of my kids with effortless sync from my wife's phone.
While I do not feel that restricting Gmail and their other data collection tools to paying customers is in Google's long term plan, the potential of random price bumps on a highly integrated, wide ranging and very much closed product experience like the Gsuite certainly creates a problematic power dynamic.