I agree, though these can deteriorate too. I've been with Vanguard for a while but was astounded as to how much the site and the customer support had degraded. Kind of worried about them but not enough to take a capital gains hit likely necessary to transfer the funds.
You can probably do an in-kind transfer (see [0] and the 4th FAQ at [1]) to another brokerage with no capital gains hit because you’re not actually selling the asset.
You can do an in-kind transfer to move the assets over to a new firm without having to sell first. Definitely works for cash, stocks, mutual funds, and bonds. Not sure what else you can do it for