In my experience with vibe.d, it's a massive pain in the arse
that it's
compiled.
It seems to me that web dev involves squillions of
micro-changes and
tweaks, and it's bloody annoying to compile and reboot the
server every
time.
vibe.d apps should be compiled for deployment, but a JIT option
while
developing/tweaking/tuning would speed up development by about
934x.
I think that's the main hold-up for vibe.d compared to popular
competition;
the iteration time is just not good, but otherwise it's awesome.
I remember some people using http://www.dsource.org/projects/ddl
for faster iterations (eg. Thomas Stachowiak in his PhD shader
tool).