Comment by ndiddy

Well the parent commenter said "SE era machines". That era of machines (Plus, SE, Classic) had an 8 MHz 68000 and only supported up to 4 MB of RAM. The Low End Mac page you linked says that your Classic II is 1.8x faster than an SE. On the 68000 Macs, System 7 (especially 7.1 and 7.5) feels a lot more sluggish than System 6, and will use over half the RAM just running the OS with no applications. Being able to skip the "extras" you mention that became mandatory on System 7 is useful when you have a slow machine with limited RAM. Of course I'm not sure what any of this has to do with running the OS on a Raspberry Pi.