That’s the way to do it, plenty of people don’t retire until they think they have enough, just cut your cloth accordingly, don’t need the latest car, TV & stuff.
I spend literally nothing as it is now. I don't drink or smoke and my hobbies are basically fitness, gaming and hiking. I'm not into high end clothing or anything like that and I'm not one for bog expensive meals out. Luckily I have a partner who is basically the female version of me!