I just purchased my first big boy table saw

These saws can be made to work really well, the fence is a weak point so good that you’ve already upgraded. The key is to spend the time necessary to tweak the setup carefully, make sure the blade is aligned to the miter slots, get the fence right etc. These adjustments need to be checked regularly too, saws like these don’t hold their adjustments as well as more expensive tools.
Have fun with it, it’s fun to get better than expected performance from a tool by tweaking it carefully.

-- Built guitars in my basement for many years, mistakes went into the wood stove, was rarely cold.

What makes them not hold there adjustments..?

What makes them not hold there adjustments..?

- slolearner

Vibration mixed with light weight and table mounted trunions. The link belt will help kill some of the vibration, and some people build a base and throw some sandbags in. Getting a set of the Contractor Saw PALS will make alignment easier, and may also help hold the alignment for longer. But realistically you just have to accept checking and adjusting alignment is going to be part of (regular) routine maintenance.