This is only true for badly written or architected systems. Usually it is a team. If you move around different teams you are probably only maintaining $currentteams apps, not everything you touched.
As such any team should ensure integrity of it’s code regardless of people coming in and out. Hiring, levels, code reviews etc. help this. Bunch of grads with no source control and write code directly in production without review would be the opposite.
SRE is a hat not a title or a team at small companies so this is how it has to be done. Also AWS probably works this way from what I have read. The team like a mini business.
As such any team should ensure integrity of it’s code regardless of people coming in and out. Hiring, levels, code reviews etc. help this. Bunch of grads with no source control and write code directly in production without review would be the opposite.
SRE is a hat not a title or a team at small companies so this is how it has to be done. Also AWS probably works this way from what I have read. The team like a mini business.