At some point I split my investments into a couple different brokerages, because I got uncomfortable having so much $ in one basket, even if that basket 'doesn't matter' and there are protections. Having been a target of.... not exactly identify theft, but pissing off the wrong people and having them target me to fuck up my life (thankfully didn't have anything to lose then), having my assets stolen is a concern, so having them spread out a bit just makes me sleep better. I keep it simple: taxable with one company, tax-advantaged with another.