You forgot to tell us it's maximum RAM capability.
The HP site is of little help in figuring out the maximum RAM for its various offerings: I wonder why.

I agree they make it way too hard it doesn't make sense unless they like people cursing HP throughout the whole process. 
   What RAM fits these laptops?   I bought two types of DDR4 3200 Mhz and they are double the length of what's inside.   

I just picked a 2020 HP Envy x360 15" with a AMD 4700u in it and 8 GB of ram from Costco and I can attest that this is a really good Ultrabook. I've owned a MSI GT75, a MSI GE72 and several other HP desktops and this is faster than all of them. I see no need to upgrade the ram at this point so the issue is nonexistent with me.

"Unlike most business laptops or gaming laptops, inexpensive consumer laptops are generally more difficult for end-users to service"

You obviously never used laptops that are anything other than HP and Dell lmao

ASUS and Acer's entry level and midrange laptops are really easy to crack open. Lenovo laptops too, but they have RAM shielding

Source: tried myself

More and more I view HP computers as disposable appliances...only the models they mass produce are cost effective to buy without painful and tedious upgrade measures... or costly build your own pricing.   So if one fits your needs exactly and is priced well its an option... but think of it as what you bought and you won't be upgrading it.  Makes life easier.

That said, the last HP Envy I bought had its keyboard stop working 2 months out of warranty.   Now its a glorified desktop with external keyboard.   The keyboard is literally the LAST thing to come out in a disassembly and the replacement will cost you enough to get a start on a new and better more upgradable machine.   Which might be the better idea from the start.

RAM is the main focus of planned obsolescence.. It's tough to find good laptops that are both cheap and have either more than 8GB or are upgradable... Personally I don't buy anything Windows or Mac that hasn't or can't be upgraded (without undue effort) to 16GB. That's my stance against planned obsolesce...

People need to start smartening up and avoid these type of laptops.
Not only because they make upgrading a pain just opening them up for a simple cleaning is now a pain