If you’re a homeowner, your toolkit probably has a hammer, screwdriver and maybe a power drill.  The rest is a bunch of other stuff you only use 20% of the time.  

If you’re a small business owner, your toolkit probably has MS Office, a printer and maybe an email marketing app.  The rest is a bunch of other stuff you only use 20% of the time.

If you’re an amateur chef, your toolkit probably has some knives, pans and maybe a Vitamix. The rest is a bunch of other stuff you only use 20% of the time.

So, since all theses toolkits probably take up lots of space, and 80% of it is hardly used, why not downsize?  Someone else probably has a toolkit to replace your “bunch of other stuff”. And that’s what that toolkit does 80% of the time.