Primary renewal

In the past there have been a few discussions as to when
you should stop updating snapshots and just delete them
and start a new one.

That time was determined by how long you were willing to
wait for finalizing...about 2 minutes max.

My thoughts now are after using FD for many years, I don't
know how many times I've booted into another snapshot in
order to repair or remove something from my Primary snapshot.

Would you delete your Primary after so many updates like
you would other snapshots?

 

No, whenever you defrag your computer, the Primary Snapshot gets defragged, there is NO NEED to delete the Primary and start over. And even if you did, what would you replace it with, another Archive or Snapshot created from what (the former Primary which you just deleted)?

Acadia

 

The archives do not get smaller, they just get bigger and if you check their size, it may be 'much' bigger than the current corresponding snapshot.

Snapshots get smaller and bigger as you uninstall/install things and add/delete data files and clear the recycle bin. You can right click and select 'Calculate snapshot size', which may be what you're really looking for.

Occasionally I delete the archive and recreate it and it's smaller than before, but unless you're hard pressed for disk space, it isn't really necessary.

As Acadia said above, there's no need to actually delete the Primary snapshot .