True! 但你懂就不怕。

 I do both residential and commercial.  I went through the cycles of  ups and downs for past many many years.   Nothing is absolute easy; but NNN is the good asset for part of real estate portfolio.   Compared to the residential, it is much easy to manage.   For 1031 exchange, it is a good choice. 

Of course, you have to buy good location NNN assets.   When vacant, there are  the new-tenants lined up.   Do not flip NNN asset, buying it with the goal to keep forever-pass down to generations.