It's also why I grab many items via the Terminal,
You are still downloading from the software repo.
Nick, I wasn't aware of that, thanks for making it so.
Still saves a lot of time from digging through hundreds of choices & at times, if more than 5 of my most commonly used are installing at once via the Software Manager (usually during a new install when setting up) will freeze, regardless if my weakest or most powerful computer. Going through the Terminal prevents this.
Note that some software cannot be installed via either, so depending on distro, will need the .deb or .rpm file, or sometimes add a PPA, choose wisely on the latter. Most, although not all of the time, software obtained by an outside source (examples, Google Chrome & Vivaldi) will update with the system update manager, there'll also be a few that won't be included in updates. This is where the PPA can be helpful, will add whatever choice & will then get updates as released with the rest of the system.
Would be great to see older choices that's long abandoned by the developer purged from the Software Manager for the sake of security and replaced with newer (supported) ones. While in general, Linux OS's are rarely attacked, keeping up to date software is just as important as with any others. Old, outdated code in decade old software can leave one on any OS wide open to an intrusion & it's been long recommended by most all security experts to keep up to date choices to avoid breaches. I've noticed that the Opera browser offered is the same very old version from many years back, although have ran only a couple of times since the original developers (many now with Vivaldi) transferred the rights to a less user friendly owner who stripped all aspects of 'community' away, has flipped ownership again since.