I have built quite a few 416s in the last 25 years and in my opinion, the .416 Taylor is the very best of the .416s for an all around rifle one can get. It has no faults at all.

In the world of custom guns, the Taylor will give you excellent ballistics that are exactly equal to the original .416 Rigby load, in a standard GEW length 98 Mauser action.

What that means to the buyer is that for any given budget (let's say $2500) you will get a far less expensive action and far less expensive brass to start out with. So in the $2500amount, you will get more gunsmithing and/or better wood, and have more money to spend on other features than you would if you wanted to make a .416 bore rifle on a longer and more expensive action.
Anyone that thinks that a .416 bullet of 400 grains at 2350 FPS is “just not enough” has either never used one, or should step up to a larger bore size. The Old Rigby is never condemned by anyone that has used it, or even seen it used, and the Taylor is identical in its ballistics.

In short, at a given budget, you will get a nicer 416 caliber rifle in the Taylor then you will in about any other .416, and you give up absolutely nothing in doing it.