I agree from the standpoint of a user of a service, but that's just how it is nowadays because they work like a giant startup incubator. Several ideas are tried, as many as possible, as fast as possible, and some are worth for them to keep. Most are not. At least if it is opensource, if Google abandons it but it still is useful for a reasonable number of people, one can hope that a community will form and take over development.
Does it matter that App Maker is only available with a G Suite business subscription? I'm skeptical too, but at least this is (indirectly) a paid product.
That's the key point. It's going to be a revenue producer from Day One.
The question is, how long will G Suite itself last (as a paid service)? If AMZN or MSFT come out with equivalent services for free or very cheap, GOOG may reciprocate, and bang, no more revenue.
I'm not seeing 24 products in 2018, but just 1 - Encrypted Search.
I just realized you're counting the Others section and incorrectly lumping them into 2018.
It would seem you also neglected to read Wikipedia's banner above the Other section that stated:
This section is missing information about the discontinuation date of each product in this section. Please expand the section to include this information. Further details may exist on the talk page. (October 2013)