The people I know who run all do it for the exercise, not because they like the running. Why would you want to extend it?
That sounds like torture. Why would you voluntarily practice a form of exercise that you actively dislike, when there are basically infinite options to get the same benefits in different ways?
Believe it or not, many people who stick with running do it because they enjoy it.
If there are other, more enjoyable, ways to get a similarly cardo-intensive workout that are equally convenient I'd love to hear them.
I like cycling. But in practice it is difficult to get my heart rate as high in a sustained way - at least, where I live. A similar level of workout takes a lot longer.
So yeah, hit me with some of these infinite possibilities please.
But I do like the effects of running, which I don't seem to be able to emulate any other way. I can't say it's torture - it should never be nor feel like torture otherwise you're doing it wrong - but it was certainly a learned taste of sorts.
It's more like this human body has been shaped to do this by aeons of evolution, and over time it feels immensely rewarding after the fact when done properly for a given fitness level.
You don't have to like running, your body does already (but might have forgotten)
The people I know who stuck to running long term like it.