It's a tough question. On the one hand, the lack of good standards and tests can introduce nasty regressions and headaches.
On the other hand, we all start from the bottom ^^, so we need to take it into account when we review other's (potentially less experienced) developers.
However, it's far better to do refactoring and cleaning incrementally. Otherwise, you might reach a deadend.
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It's a tough question. On the one hand, the lack of good standards and tests can introduce nasty regressions and headaches.
On the other hand, we all start from the bottom ^^, so we need to take it into account when we review other's (potentially less experienced) developers.
However, it's far better to do refactoring and cleaning incrementally. Otherwise, you might reach a deadend.