I think it's cool that these plugins are available, especially for free.
However, I've always felt that these plugins are too gimmicky, because they (understandably) cater to the mainstream aspect of vinyl sound, which is precisely the crackles, noise, etc that make vinyl sound "old school" or "retro."
Personally I generally listen to digital sources and don't feel the need to try to mimic a vinyl sound. But putting that aside for the moment, what I'd really like to see - and IMHO what makes vinyl attractive to self-described audiophiles in particular - is a plugin that emulates phono cartridges rather than the mechanical flaws of turntables and LPs themselves. My hypothesis - and I freely admit it's just a hypothesis, with nothing more than impressionistic and anecdotal evidence back this up - is that most of the audiophile preference for vinyl comes from the resonances of the playback system, particularly the resonant nature of the stylus tracking a physical groove, plus the frequency-variable channel crosstalk introduced by the LP/cartridge link in the chain.
So many audiophiles report that to them vinyl has a cohesive sound that digital lacks, and I cannot think of a better main candidate for the cause of that than reduced channel separation produced by crosstalk - which crosstalk is very difficult to reproduce digitally because it is so variable. Similarly, vinyl often has softened highs (or upper-mids) and more resonant bass, which is an artifact of reduced fidelity but which many folks find pleasant - drums become more "organic" or "natural-sounding" to some folks' ears, and mids and/or highs become less "edgy/harsh" or have less "bite."
Let me be 100% clear - I personally am not an advocate or fan of that kind of euphonic distortion. But I have heard it with vinyl and vinyl rips, and my only point is that the stuff that makes a lot of self-identified audiophiles prefer vinyl is not, IMHO, addressed by these vinyl plugins. IMHO the most likely factors are crosstalk and resonance.