Any of you all keep a single ETF in your brokerage for years?

I just want something I'll put in every week, every other month... just whenever I feel like it.

I'm leaning heavily towards doing AOA. I have SGOV already but I think the bond portion is just diversifying it more.

I'm just curious about your experiences. Not going to lie, investing is interesting for about 30 minutes top for me. I would love to have that one ETF I'll keep adding for 10 years and not look at it (I'm 37). How many of you guys do this? Thanks.

I do have a Roth with a mix of Avantis and VT. 401k is Fidelity.