I have a 'step in' shower which ticks most boxes.
I did fancy a wet room but kept reading of various problems so decided against that.
Yes, it's still in the " see what's possible stage " so we'll see what our options are. A friend recently had a new bathroom installed by one of the " Big Box " DIY stores. It looked quite impressive but there were various problems with air locks, toiulet not flushing properly etc. The installers came back a couple of times but then started to blame the exisiting plumbing as the source of the problem. I recommended a plumber who has done various job for us over the years. He went and took a look and was horrified. They'd fitted the cistern internals the wrong way round, glued the cistern to the wall instead of using the supplied fiixing kit, fitted a flexible pipe that was too long and therefore was kinked and would have eventually failed etc etc. Part of the problem is that you can go and look at the in store displays, have your new bathroom designed for you, but then they use the cheapest sub contractors they can find so as to maximise profit.
Our plumber came round and looked things over, he said what he thought would be possible, but It's not the work that he does himself so he gave us the phone number of a couple of trusted plumbers who specialise in what we are hoping to do. At least we know we are going to get an honest appraisal.