I used Norton once in 2005, on a computer I knew, for a fact, was infected. It didn't find anything, even when running it in "safe mode". Then I did a google search and found Spybot S&D. on the first run, it found about 1800 viruses. On a second run on "safe mode", it found another 300. I never used Norton again.
Norton was then just an antivirus program, without detecting adware, spyware, or malware - and that's exactly what a specialized program for such things discovered - I know that because I used Spybot at the same time. In everything that that program found on your computer, most of it was probably pretty harmless, and I'm sure it wasn't viruses. It's like comparing Malwarebytes to any AV program today, this first one is synonymous when it comes to fighting malware.
Although, why I find it intrusive is because it constantly tries to push additional products onto you... I believe they're enabled by default, and can be turned off through the settings.
Just a few minutes is enough to personalize the program, which includes this option - and I have it turned on and get 1-2 notifications in a week, sometimes not even one. I understand that there are much better ways to protect, especially if the computer has anything to do with cryptocurrencies - but as for me personally, I do not deal with any risky things, I have a hardware wallet and protection with antivirus + premium Malwarebytes and regular system updates are quite enough for me - and they do not burden the system to the extent that it would bother me. At this point, it’s the level of protection I can live with and feel safe with.