I'm a new member here at MalwareTips, but not new with computers. I have been using computers since the late 1980s and early 1990's, starting with MS-DOS and Windows 3.1, then later Win95, 98, Win2K, XP, Vista, 7 and now Win10. And I started using Linux in the late 1990's.
Back in the old days, you basically had to use admin account, to get anything done. Honestly I have always used the admin account when using Windows, it is a habit from my 30 years with computers. I still prefer to be the admin when using Windows. I'm often doing tasks that need to be run from the admin account.
I know using SUA for doing everyday tasks has improved a lot, from the way things were 20 years ago with Windows 2000.
When I use Linux, I normally use the standard user account, and only use the root (admin) to install and upgrade software, and admin the computer. Or use sudo on those distros that use sudo.
EDIT: I do plan to use a standard user account more often, for playing games for instance, and basic office tasks. And use admin account, when it is warranted.