I could see something like /20 being useful not so much for the number of addresses but to group things by use case, then /8 because you don’t care and it doesn’t matter. Also 10.0 is quicker to type and cleaner to look at than 192.168

I use the low numbers for statics, less to remember/communicate if its a 1/2 digit number instead of 3.

My DHCP is 100-something I dont remember because I don’t care about or respect the devices using DHCP.

I should install Debian to replace my current Ubuntu install at some point. Might move some services I run to a VM to reduce effort when reinstalling my OS. Then it’s just install steam and copy over my game backup folders. Plus with a VM I can easily move it to a proxmox mini PC if I ever get round to buying one.