@andrewgr im not sure if this really helps but this is an interesting topic and an important one. Many very good points and ideas have been presented. I have been reading and learning. Besides all that, from a hobby perspective it's fun!
i built some crummy wooden benches which worked fine. I kept building them stronger and they got heavy and expensive when scrapped materials could not be used. I find that a strong wooden bench while excellent is heavy for its strength and uses a lot of volume. I just divested myself of one I built that was 36x96" and used 6x6 posts, 2x6 stringers And 3/4" plywood. It had built in cabinets and new resides in my son's barn with a 5" Charles Parker vise I fixed up for him. that bench used too much room for what I began to need (I built it near 25years ago) and it is so heavy as to be nearly immovable.
I have used my oldest bench since I was 13 years old and was handed on to me by my father in 1983. It was old in the 1970s and while I hope to restore it, it is a centerpiece in my shop.
I like steel in benches because of the strength they provide vs the volume and weight of construction.
The last wooden bench I built that still survives in the shop is a bit of a catch-all that includes a granite plate...
the specific design I recommended I have purchased used and new. This one includes an "inlet" steel plate for the corner vise (the best location in my opinion) as mentioned by a previous poster. This bench was given to me and I could have had 3 of them but for my lack of space.
For welding and heavy beating on stuff I built a steel bench made from a 1/2" thick steel plate I was given.
another used bench I won at auction replaced the wooded behemoth I mentioned earlier. It has a 43" height which I enjoy for standing and working. It uses the type of specific plywood top which is less expensive than the Maple ones. It's super strong but not as hard.
I agree with Bill regarding these things being personal and custom to your need. Your needs would be much different for tying flys than it would be for restoring old locomotive parts.
My most specialized and custom bench just for interested parties:
I have seen others use a salvaged solid core door and a set off saw horses to great effect so don't hesitate to do what's needed to produce what is arguably the most important tool in the shop!
my last photo to bore you with is a mail order purchased new bench like I originally suggested. Not inexpensive but something to be used for a lifetime or two.