I did it for a total of 4ish years, split 1 1/2 year before C19 and the rest after 2022. From SW London to Stansted, going through the core of London, 42 miles one way. Prior Covid, most of roads were 30mph and bus lanes were part-time so it would take me approx. 1:15h at normal traffic. Rush hour would be around 1:35h, bear in mind the last 30 miles to the airport would only take me around 40ish minutes so the problem was always the city driving. Nowadays all London roads, including busy 4 lane A roads, are 20mph which is an absolute joke, the bus lanes are now full-time so you can't just drive on it anymore meaning traffic now picks up much quicker due to the restricted flow. It now takes me 1:30h with normal traffic, during rush hour I never leave with less than 2 hours prior report so on long days I would just stay on local cheap accommodation.
The reality was that I would not have a life during working days, and then off days meant I needed at least 1 day to recover from all of it. I've now moved closer and I don't look back. I still go there occasionally due to family but I don't dread it anymore. My take is that if you do it, make sure it is short to medium term and have a long term plan to cut down the commute (definitely stick with your 1 year plan to potentially move). While it might be nice at the start, it will wear down your health (mainly lower body as you are spending another couple hours sat with no mobility), it won't also be sustainable unless you have fairly short days at work.