that thread is here:

New BSO long-term test!

the last calculation is here. quickly (that included the bike itself, extra fenders, lights, bike lock, all parts, maintenance) but didn't include the helmet or any clothes. I was hit once on the bike and needed a new rear wheel and some other bits (I think that comes under maintenance as I ride in dense urban areas usually). I needed new bars as I went from drops to flats. the lights still charge and work (USB after 12 years and the lock is still good). I could ride it some more, but I want the MTB for the kiddos on the back.

I could've bought a cheaper bike but I wanted to try a coloured FGSS bike and this was the cheapest on the market at the time.

episode 521
5521km/3430mi/264.16h
£605.76/€679.05/$777.27 total
£2.293/€2.570/$2.942 per hour
£0.1097/€0.1229/$0.2266 per km/mi
£1.162/€1.303/$1.492per RT commute

When I compared this the cost of having a car in the UK for 10 years and 150k miles, all-in, it was 30p/mi or $0.39/mi. (including all running costs and depreciation). we still use that car but not as much as longer (163k miles now and needs a service next month £300 for a yearly MOT, oil change and two new rear tyres). obviously, you can take 5 people in the Golf and only two on the bike easily, so per person it's likely closer than the gap suggests. 25-40% of those miles are likely with multiple people.