The stuff just works.
From the experience of having several critical business SaaS tools go thru constant UX changes that disrespect the user and make the product less stable, I'm actually glad Google still have some respect for the user.
That's why i will gladly buy gsuite for the businesses i provide advice to, yet actively considering replacements of core business infra of which im a power user....for several years.
Its hard to keep something running with no bugs, or downtime.
Its even harder to change something, and keep it bug free, and with no downtime.
e.g. grep, vim.
For products that are core, large UI changes tend to just annoy a lot of users, unless there's something really amazing about the change. Even then, people are hesitant to like new UIs. Engineers and designers definitely want to try new things, but balancing those against messing with UIs that a billion+ people use is hard.
My general take on drive and calendar, if they are trying to improve these cases for enterprise users. There's a lot of very non-sexy work going on to make these improvements, and they aren't always visible.
But it's small improvements that make the big difference. A small user interface element added or removed to speed up an interaction. An updated user experience so that data can be found or organized in a slightly different way.
I could pick on almost everyone of Google's products and have gripes about some UI or UX choice. Missing functionality here, overly complex there, etc. Every product has obvious low hanging fruit that could be improved.
That's what parent is referring to (I assume). There's no more micro-innovation happening. If it's not a change that makes 100 bazallion dollars, then it's just not a change worth doing, apparently.
A good example is changing the typeface of text labels in every product to match the new Google logo, which Google seem to have been continuously doing for years on end now. I would argue this even has negative value, as it creates a mix of two typefaces (Roboto and Product Sans) in every product that used to have one, which causes every future UI design decision to be saddled with the extra cost of deciding which of the two to use.
Protonmail understood this and catered to this need without much fuss: https://i.imgur.com/1ZhWOsC.png
Also the latest updates to Sheets in the menubars have been welcome
Unfortunately DDG is much worse in a different way - it seems incapable of dealing with synonyms. I can't recall a specific example since I switched back to Google, but it's on the order of searching for Python and getting results for Java (wrong subtree of the taxonomy), searching for Wellington and getting results for the whole of New Zealand (ignoring specifiers), or searching for double glazed windows and getting results for Microsoft Windows (no understanding of the semantics of the words being related).