Recently emailed two different electric conversion guys, one in CA and one in FL, just on a whim to see what it could cost. Yep, it can run into the thousands whether you do it yourself or not, but those prices will drop just like flatscreen tv's did over the years. I'll probably keep reading articles and maybe even delve into the specifics learning engineering designs, changing battery technology, etc., just because I'm a reader.
I recently got a 1967 Triumph Spitfire MK2 with a ll47 cc 4-cylinder engine with the dual HS2 carbs, and it's a blast to drive the little 4 speed. It's pushing 60,000 miles soon. The previous owner had a lot of rebuild work done, most of it 20 years ago, but didn't put too many miles on it since all that work, so I'm not overwhelmed maintaining and improving it. My recent modification from the original is gutting the points and condenser and installing a Pertronix electronic ignition, which a purist would probably be against. I can see driving it for a few years, probably less than 5,000 miles per year, as it's tagged as an antique hobby car with Hagerty insurance. Down the road, when problems start occurring more often, I really don't see any problem switching out the internal combustion engine for a electric motor drive setup, keeping the 4-speed transmission and possibly same suspension, rack-and-pinion steering, disc and drum brakes, no radio, no air, same vibe although maybe that should involve some kind of sound effects. There will be more and more folks offering electric conversions, especially on classic cars, and like it or not, there will be more electric and less fossil-fuel transportation on the road sooner than later. It also helps that I have a 2001 Honda S2000 with the 2.0 4-cylinder engine giving me about 240 horsepower. It's a 6 speed that's a blast to drive. The Triumph and the S2000 are apples and oranges. The S2000 can remain a gas burner that I put 93 octane gas in, with no plans to electrify.