AR-15 Build Critiques

I have an admitted problem of liking guns too much.  It is an expensive habit, more expensive than my video game habit.  I have been watching some demonetized videos on YouTube about AR-15 builds.  I find myself doing an inner commentary on their builds.  "Why have a light on an 18 inch DMR (Designated Marksman Rifle) build?"  "Why have a bi-pod on a 14.5" entry gun?"

So, IMHFO let's take a look at what I think are 4 major categories of AR-15 types.

1. The Designated Marksman Rifle or Special Purpose Rifle - Usually an 18 inch or 20 inch barrel, free float tube with M-LOK, grip-pod or bi-pod, Trijicon ACOG or some other hi quality low variable power scope, and suppressor.  The rifle is good for targets from 200 to 500 meters.
2. The General Purpose Rifle (aka Truck Gun) - An off the rack good quality AR-15 with a sling, an AimPoint or similar gun sight, and light attached.
3. The Hunter - Similar to the DMR/SPR but with a heftier caliber, 300 Blackout, 6.8 Remington SPC, or .25-45 Sharps.  Painted or hydro-dipped to camouflage the rifle.  Using 5-round magazines to comply with most states hunting regulations.  Used mainly for filling freezers with meat.
4. The Entry Gun - A 16" or shorter barrel.  Aimpoint or similar red-dot sight, muzzle brake that directs gas forward, vertical or angled front grip, single point sling, and flash light.