I don't recall many ETFs failing in material ways in 2008 - I do agree with your view on exercising caution with ETFs. There are 5 different ETF legal structure

I don't recall many ETFs failing in material ways in 2008 - I do agree with your view on exercising caution with ETFs. There are 5 different ETF legal structures and they each provide different investor protections. Few retail investors who buy ETFs know (or care) about the differences - but in times of stress they could make a difference.