There was a recent issue on Bioinfo SE here on a question about compiling gromacs for CPU or GPU (below).
It appears a question was deleted together with @MatteoFerla's response and one question remains. Having a valid response deleted would be frustrating.
The OP denies deleting the post, but it is possible there was cross-posting within the group by different users. For example, the problem is shared within the group, one OP posts here, a second OP posts here and one OP deletes their question.
Coincidence of two independent OPs seems unlikely on technical criteria.
I propose simple protocol where the responder has the right to comment that a discarded reply has occurred and request this is avoided. The OP can issue an explanation.
Is that reasonable? We have a similar unwritten protocol for cross-posting with Biostars.
I also propose @DevonRyan cleans up the comments below @MatteoFerla's comment(s) on the OP. That ok?
Technically the response is good and the question is fine. To answer the question one would need to look up the compiling flags, which is time consuming unless your the original developer. The technical issues between CPU/GPU wouldn't be apparent to a user: GPU parallelises very large numbers of very small differential equations, which a CPU can't do and thats how GPU speeds up the calculation. The reason you need to compile two versions is related to this issue.