No.Would anyone agree that installing SI singles in domestic could lead to dangerous situations in future when a householder alters the wiring
Even if it did, there are already huge numbers of properties wired with singles in conduit - two common examples being older council / local authority houses and blocks of flats.
If people can't deal with conduit, then they should leave well alone. Why compromise the design of an installation just so that incompetent fools won't be confused at some later date?