algent Not sure how you manage to use 10.
Okay, here's an example. It's surprisingly easy for me to use ten on a general-purpose laptop where I spend most of my time. On a computer that's mostly meant for a specific purpose, like a workstation or a server, not that many are useful.
Start with the assumption that I prefer to have large applications, like an email client and calendar, in a workspace by itself, and I want to be able to select an available application with a single mouse click, not search for it, or need to launch it from a menu when it's something that I frequently use.
So, on that laptop I have one workspace dedicated to Thunderbird, as I typically I check my email whenever something arrives to one of the four accounts I use. And I add new events to my calendar at various times. So, Thunderbird is always running. I've come to depend on appointment reminders from it when I'm busy with other things.
The second and third workspaces contain two instances of Brave. The first has tabs for a news site, my online banking client, my brokerage account, and the one social medium that I use, Parler. The second instance of Brave has this forum always available, and I also use that one for online shopping. And for viewing soccer, rugby, MotoGP, World Superbikes, Formula 1, Formula E, IndieCars, and so on. I.e., mostly entertainment.
The fourth, fifth, and sixth workspaces contain three games that I typically play several times a day to keep my mind active. The seventh workspace normally has Windows 10 Pro running in a VM, so I can monitor my Ring doorbell, and take a quick look when I hear a delivery arriving at the front door. (There's no Ring app available for Linux.) Sometimes I also use a Nook client on Windows to read ebooks. The eighth, I keep free for apps I occasionally need to use, like LibreOffice, but I usually don't need them active all the time.
Workspace nine is for various system tools, like the file manager, system settings, and other utilities. Ten is for a terminal, which I always keep handy, because I tend to use it frequently.
Sure, I could get by with fewer workspaces on that laptop, if I had any reason to, but ten of them fit on the bottom panel with room to spare. That machine is powerful enough (Dell MX4800) to easily keep the applications that I use all the time available, and I don't like to pile them on top of one another.
Since ten workspaces cost just as much as one, why not make use of them to make life easier?