You're probably right, the newer ones are better I think - mine is ten years old. I could use a lighter cushion and not carry a spare tube & tools etc. if I had to, but it doesn't wheelie or bounce down stairs as well as the Ti. I also like having no push handles - it discourages people from offering you a push when you don't want one and is generally much more 'sportier/active'. After a while, you'll probably find it very annoying when someone touches your 'wheels' too.
Like you, I can still stand and walk a few steps, but only if I use sticks or lean on something and I look like I'm drunk. Still, it's enough to allow keep me driving my car so I shouldn't complain. I have
Hypermobile Ehlers-Danloss Syndrome and as a result of spinal surgery many years ago, suspected
Arachnoiditis. Then of course, there's the Arthritis, Gout,
Tenosynovitis and other stuff that just causes more bloody pain.
I was also very fit too; Hang Gliding, Paragliding and Karate Instructor as well as a light aircraft pilot. Plus, I enjoyed other stuff like cycling, running and swimming etc. Having lost all that (plus my partner, house and business), I spent about ten years trying to drink myself to death, but my sister and brother-in-law have been incredibly supportive and they alone have got me through that. I don't drink much at all now - just once a week when they visit. In fact they're due here any minute, so I'd better go and open the wine.
With regards to a mobility scooter, these are great for general age related mobility or limb injury issues, but they're completely useless for anyone with spinal injury. Besides, you can't take them in a lot of shops, on trains, buses, taxis or bounce them down a flight of stairs.
View: https://youtu.be/xglxZQSP-Io?t=43