Well, for once, last weekend I realized again just how comfortable it is on OS 9 to add or deactivate system components (Extensions). Don't need Modem support? Yank out the respective extension! Reboot. Done in 2 mins. Hence - it's possible to create a truly & fully personalized computing experience, optimized to *your* own personal wishes and demands. Good luck trying that with your Windows 11 laptop!
I agree, I love the ease of customization with the Finder. Unix-based systems may be more customizable (to the degree that Apple or Microsoft want you to be able to customize, and in Microsoft's case, what tier of OS you bought), but the Finder presents those options in a clear format. The Extensions Manager is a brilliant interface, easy enough for me as a yute to mess around with, turning on and off different system functionality. Maybe a bit too easy, since I can remember more than a few times having the OS crash or not boot correctly.
I've been thinking about this reply for a few days now since it's difficult for me to extricate my nostalgia for the Finder. I like it because it reminds me of a time long since gone, a simpler era of the 1990s where I was optimistic about the future and excited to see what new technologies will come next. Now, as an old, jaded and grumpy computer user of many decades, I no longer yearn for the new and cutting edge. I want the good ol' days, and I want the user interface that evokes those memories.
That's not to say OS 9 isn't a good operating system, it's great. It's one of the best I've ever used and it served me well as a daily driver back then. I had a PowerBook 1440 and it served me well for schoolwork. If my work wasn't so wrapped-up in cloud-based document workflows, I'd try to use my clamshell iBook for my modern computing needs. But ultimately computers are tools, and an unused tool is a decoration.
So again I must gush and thank the people who keep OS 9 alive. Thanks to Cameron Kaiser and the other developers of Classilla so I can post this! Thanks to the owners and moderators of this forum for keeping discussion alive! And thanks to all of you reading this for being interested in the glory of OS 9!