I never shut down my SOHO Win10 machine.
I can TeamViewer into it from my phone or any other machine.
I used to use it for QuickBooks, AutoCAD and other programs a lot.
With better Wi-Fi and cellular data connectivity, along with Dropbox sync that frequencyof remote connectivity has diminished.

I still use it for Outlook to sort incoming emails so I don't have to manually do it on my phone.

An apple computer. A windows 7 computer. Linux. All would receive a different response. We cant help you if you cant help us help you.

I didn't realize some people are still using mechanical HDDs. Interesting....

Some people? Still most people, by far.

Aren't all the drives in all the large large storage units (often called "hard drives") also mechanical drives? I'd think a lot of that technology would still be used in desktop computers.

An article at [Link: statista.com], "Shipments of hard and solid state disk (HDD/SSD) drives worldwide from 2015 to 2021 (in millions)" shows a bar graph with the quantity of HDDs shipped and SSDs shipped from 2015 through predictions in 2021. HDD shippage is decreasing and SSD shippage is increasing, with them crossing over some time in 2020 or 2021.

"Number shipped" is not the quantity put into computers, but presumably a similar percentage of units of each type are used externally. In fact, when it comes to convenience and hardiness, it's a good guess that more SSDs are being used externally than HDDs. It that's true, that boosts the percentage of HDDs we should expect to see still being put into new computers.