Just because the system is using most of the RAM does not necessarily mean there is a memory leak.
Do you get "Your system has run out of application memory" alert?
macOS tries to use up as much RAM as possible, by design.
Doing sudo purge goes against and you should really not do it.
Now there COULD be a memory leak somewhere, but we need more information to try and figure out what the problem is.
First, keep a look on Activity Monitor and see what is using a lot of memory.
What do you seen in the area at the bottom reporting "memory pressure", "application memory", and "cached files"?
Mine looks like this:

Just so as long the memory pressure remains green, it's fine.
I do have some swap used, but then I have run my mac for days, and often have 15 apps open and many Safari tabs, so it's not very surprising.
With your 96GB there should be zero or a tiny amount of swap space.