I live in the UK, and I can say it depends greatly on your circumstances.
In general, if you’re traveling between an outside town to a city it’s usually an alright experience.
However, if your commute is between two outside towns then you have to be lucky, otherwise a car ends up being the only real viable option. My work is about 15 miles away, and before I had a car I had the only option of a railway line that ran through my town. If that line ever had issues getting cancelled or on the train strikes were on that day I couldn’t get to work because to get my work was 2 buses and 2 hours to go 15 miles. The train ran once an hour and didn’t call at half the stops on a Sunday including the stop I needed for work so if it was a Sunday I literally could not get to work.
It’s not even cheaper than a car when I factor in leisure travel, many places I regularly go to take longer to get to by car and are usually a worse experience whether that be service infrequency, long layover times or services getting cancelled/being on strike.