I think that sticking with the same binding, so that you have a lot of familiarity with them has some pluses. Sorry for this novel.
I've had this binding conversation with Phil and Bill Talbot a few times. If they still produced it, the Look P-15, or Rossi FKS 155 would be my absolute binding of choice for almost of my skis. Everything, I think but deep powder skis. That would be just because I'd be a bit lazy getting back in after coming out. For me, they have the right DIN range, the right materials {other than the cup on the heels for your pole tip to gouge out}, the right design. The only downside is the cost of extra brakes, and the effort tho swap them, etc. And of course, the minor fact that they are sadly no longer in production.
I'm not a fan of the P-14 toe. The DIN range in the P-18 I more than I want. I've dropped a lot of weight over the past 18 month, and I'm about 195lbs. I still "send it" according to my kids, but I'm also 61. So, while I want to ski at a DIN of 9-11 or so most of the time, I don't want a min 9 or 10 DIN. Might be old school thinking, in not skiing at the bottom of the range, but I'm sticking with it. Force of habit.
Our daughter was a comp'd Rossi athlete a long time ago, and like a dope, I didn't hold on to her 155's or 185's. She used to get about six pairs a season, and we'd pass them on, sell them, return them. Some would make their way to my skis. But her older race skis were always in demand, and they were useless without Rossi bindings. So….no knowing they'd dump the binding, we kept very few. I remember giving boxes of them to her ski academy after she changed companies. Pains me to recall it.
Our son was on Elan over a decade a ago, and they had a deal with Salomon at the time. All of his tech skis were set up with a VIST plate and Salomon 916's. The speed skis had 920's. We had a lot of bindings, and we kept almost all of those. A bunch are still being skied…a lot. I love the 916. Same binding as the STH16 steel.
I now have almost all of my skis now set up with Salomon STH2 16's, unless they don't come flat, as is the case with a couple pairs of my Head's. I made the decision to move to that binding due to the huge 7-16 DIN range, primarily. But I like the toe design, and the elasticity. I have been really pleased with it, in every respect. Rock solid feel, nice clunk getting in. And I've come out of them when I needed to….not much, maybe 3-4 times in a lot of ski days. Swapping brakes is easy, if needed. The heel travel does come in handy upon occasion. I think I have about 60 days on the pair with the most use. All good.
I mounted a pair of my wife's skis with the STH2 13 two years ago. She had previously had the ski mounted with an STH12, and she immediately noticed, or at least perceived, a much more solid feel. Since then, we've mounted her skis with that binding, other than her Head Super Joys. Our daughter is all Solly these days. Some STH2 16's, some STH2 13's, and a couple of pairs of Guardians. She had never really skied on a Solly until her race days wound down after college a few years ago. Big Solly fan now.
BTW, very happy with the Head branded Tyrolia's on our Head's. They've worked fine. Our son has a lot of experience with Tyrolia bindings as well, and the race bindings that he's had always did the job. Good product.
But, yeah, I think that sticking to a binding that you're familiar with, comfortable with, etc. makes some sense.