I just found this term https://en.wikipedia.org/wiki/Software_rot:
Software rot, also known as bit rot, code rot, software erosion, software decay, or software entropy is either a slow deterioration of software quality over time or its diminishing responsiveness that will eventually lead to software becoming faulty, unusable, or in need of upgrade.
And here https://www.techopedia.com/definition/22202/software-rot (notice their difference)
Software rot refers to the slow degradation in the performance of computer software. Such software shows diminished responsiveness, lacks updates, may become faulty overtime owing to changes in the operating system it is running on and thus may need upgrading.
I would assume software rot is not a term most people are aware of. But I can't think of a term to describe the situation of a slow deterioration of software quality over time although I guess many people experience that, e.g. IE, Window XP, facebook ? (just to name a few)
Has anyone coined a term for that? Besides, refactoring is a term, closed related to "Software rot" (to counteract that) most software engineer knows. So why there is no term for "Software rot" ?
BTW, I notice this similar question Who first used the term "bit rot"? asked 10 years ago. The meaning there is also slight different that software rot explained in wikipedia.
Bit rot, also known as bit decay, data rot, or data decay, is a colloquial computing term used to describe either a gradual decay of storage media or the degradation of a software program over time. The latter use of the term implies that software can wear out or rust like a physical tool.