I've never used the modern sectional track systems. One of the attributes that made GG track so appealing was its inherent flexibility. Need a special section of track--bend it and cut it. Need an isolated rail section--get the Dremel out and cut the outside rail. And, so on. No need to buy special track sections; no need to buy a chop saw or band saw. Very, very simple product to use.
At times, I think the software libraries so many folks use to design layouts actually gets in the way of flexibility. Too many quarter curves instead of a cosmetically more appealing easement.
As many have said, it's your $$$; get what you want.