I am often asked which system is better. The answer is often not clear and depends on the lifestyle of the people in the house and what they expect out of their hot water heating system.
I recently found this fairly unbiased comparison of tanks vs tankless. The video starts out debunking three “myths” about tankless systems and then goes on to talk about 3 reasons why you might want to have one installed.
https://www.youtube.com/watch?v=vRUgFmBaSCM
Have a look if this is a concern for you. I found it helped me!