I ran an NVR for 4 years myself! At first it is all just so exciting and I was so new to it all I just thought “This is just how security camera systems work”.
After the first few months of excitement wore off, not a day went by that I was impressed (you can read my many posts on that subject) but it had 4 cameras and things got recorded dangit!
I had 2 friends at work that were running BI. They could do things that my NVR could not even imagine, but I stuck with it. Mostly because I thought that BI was complicated. Then, about 2 years ago, I finally pulled the plug and switched. My only thought once BI was up and running was this: “why did I not do this earlier?”
Honestly though, it depends on what you are trying to accomplish. You still have not mentioned what you are trying to cover. If it is your pets inside, then an NVR would work fine (I do that as well). If it is to monitor the mail delivery then an NVR will work well also. However, if you have actual security concerns, then a prudent person would thoughtfully review what value is installing a system that if damage occurs to something, how happy will you be if you present the police with an image that they cannot use?
So maybe choose based on how you can best help yourself post incident! Because cameras are mainly reactive, not proactive (if your not pet monitoring). Meaning that you record the incident, then take action against the perp later. Maybe that will help you to determine which approach is more desirable for your situation.
