The house we bought had an Aga, and we removed it.
Pros: made amazing pancakes
was nice to rest your bum on a cold day
kettle was always warm
kitchen was always warm (we moved in autumn)
it heated our water so we always had hot water (although if the tank was emptied after 3 showers, it still needed time to refill)
Cons: we were being bankrupted in oil costs
we're generally out of the house from 7:30am to 6pm (when it's not Covid...), so seemed exceptionally wasteful
Because of the short amount of time actually in the house, I needed to be able to control temperature for cooking
No space for a 'summer' oven, so would have had to keep on all year around - when we viewed the house in the summer, they basically kept all downstairs doors open constantly.
Some of the arguments we were given for keeping them just didn't work for me - when I do the washing, I generally do 3-5 loads a day. I could dry about 1/4 of a load on the Aga, and it would always be in the way of me trying to cook, and I didn't really want clean clothes in my kitchen being used to prep/cook food. I also managed to burn some clothes that were drying on the Aga, which didn't fill me with confidence that it was a safe thing to do.
As for converting it, the cost was also eye watering, and I wasn't convinced electric was going to be the best method for us either.
We couldn't sell ours in the end - it was an oil Aga, and these are very out of fashion, we had to pay someone to come and take it away.
We now have an electric range oven with an induction hob, I can switch it on and off and choose the temperature at will. What a luxury!?! Be aware though that Agas are also not standard widths, so if you do decide to replace it, you'll need to come up with a solution on how to bridge the gap left (we had 1 unit next to it which we had moved as part of a general kitchen refrub - we couldn't afford to re-do the kitchen, but you may be able to ). We're now the only house in the village without an Aga (probably an overstatement, but every house I've been to in our small village has one), so could be deemed as devaluing the house, but seeing as we plan to be here for a very long time, I'll live with that!