What are the risks for a bootstrapped startup?

I had a discussion with my brother regarding the risks of a bootstrapped startup versus a "stable" job in a big company.

My thesis is that a startup that is fully bootstrapped and has grown organically is much more stable assuming that the largest chunk of your income comes from a lot of small customers. It is very unlikely that you will loose so many customers that it will put you out of business, since at this stage you have learnt how to gain new customers and you will be improving the product iteratively to keep current customers happy as well as gaining new ones and reduce churning.

Still there are some risks that could put you out of business:

• Your cloud account gets hacked and you loose all your customers or get "ransomwared" into bankruptcy.
• You get "sherlocked". i.e. some very big actor makes your solution unnecessary so all your customers just leave you in the dust https://www.howtogeek.com/297651/what-does-it-mean-when-a-company-sherlocks-an-app/

Any other risks worth considering?