If the infrastructure meets the code at time of construction, then it’s fine, but when it breaks down, you then run into problems. A bit like many old balustrades that don’t meet the height code of today. If part of it is damaged, you can’t just fix that section. You gotta replace the whole thing to meet current code.
Another pandora’s box is getting a WHS report. Insurance companies LOVE to go through those and demand fixes.
An issue with WHS is they do a bit of one size fits all report. You have NO tactile indicators!
Well and good for a high traffic shopping centre and a huge apartment complex, but for a less than 10 lot apartment block?
I’m sure my block built in 1965 meets next to nothing of the current building code.