That is just because lineage 14.1 is too old for them. Next year it will happen with 15.1.It's sad that the LG G5 is no longer supported. It seems to me that the number of supported devices is melting like a polar bear on Waikiki beach. Do you think that some devices - especially the LG G5 H850 - will be resurrected under LOS 15.1?
Edit: I got that LineageOS is focusing on LOS 16 and that - as far as I can see - the LG G5 is currently not among the supported devices. I hope they will include it.
With respect to the specific subject of this thread, namely *official* builds of version 14.1, we can be certain that it will never be restarted. No new official LineageOS 14.1 builds will ever be created for any device from any manufacturer.
With respect to unofficial builds, I think it's unlikely that anyone could justify taking over maintaining unofficial builds of 14.1, when we already have unofficial 15.1 builds that are being published by some of the same people who used to officially maintain 14.1.
Having said all of that, I think that as long as there are still people out there who choose to use the old 14.1 builds, it's fair to keep a place open where they can discuss their experiences, issues, workarounds, etc.