2013 owner with 70k on the clock. 70% SOH battery.
I reckon I could do about 75 miles of motorway driving if you keep your speed under 60mph and accelerate/brake sensibly. Possibly more if yo stay off the motorway.
This sounds extremely limiting but with young kids it's rare we 5o miles without stopping for something. All you need is something like ABRP and the charging stops are clearly planned. It requires a shift in your driving but I'm quite enjoying the relaxed pace. Rather than getting frustrated and looking for overtaking opportunities behind a slow driver, you suddenly enjoy being able to relax a bit and clock up the extra range.
Unless you are prepared to adjust your driving and limit your speed on longer journeys, older EVs probably won't work. I don't doubt we will need to upgrade in future.
However, I would say if most of your journeys are within the range of your battery; if you are prepared to adjust you driving and if you are prepared for (minimal) planning and extended times on longer trips, then older Leafs work absolutely fine. If you want to drive it just like an ICE car, then probably not unless you can afford a newer EV. Essentially older Leafs were experimental/ground breaking at the time. That innovation comes with numerous issues, but also the benefit over a decade of experience of the issues and suitable workarounds.
My feeling is that within a few years reconduioned batteries for early Leafs will become widespread rather than the relatively niche industry they are at the moment. At that stage "older" EVs will not really matter. It will be like anything else. Every decade or so you upgrade the battery, but the essential drive train will pretty much outlast everyone.
I'm pretty certain the reason why this hasn't happened already is that so called million mile drive trains are a huge issue for car companies, who have relied on cars being scrapped near to 100k miles. However, they are facing the fact that if they don't get into battery replacement, other companies will. Being the first one to jump has massive PR advantages. II will... eventually... happen.