Thank you. Yeah I’ve understood and know of all those things but local view isolates to a single object and I might need another object(s) visible for reference so in the example below I would want to keep some/all of the other parts of the leg visible to help model the individual part but would want to temp hide everything else.
I also find the local view implementation odd!
If I hit / in on the top level object it won’t isolate but it will if I’m in edit mode – but once isolated I can view it in object mode
Hitting slash with Left Leg selected in object mode doesn’t work

Hitting slash AFTER left leg is in edit mode does work

Any child object under the Left Leg parent will isolate from object mode though.

Are all these ‘quirks’ you just have to learn about and accept or am I missing something?