I ran and maintained a CircleMUD for some years but always felt that we should have run LPMud (or MudOS). Those were clearly the superior technology. And playing them was so cool because they _changed_ much more often because it was painless.
The last maintained LPMud fork that I know of is LDMud https://github.com/ldmud/ldmud . Would be cool if there are others.
The BEAM vm has a lot of the functionality you mention from LPC and Pike. Erlang being from the 80s—predating LPC—and also from Sweden, I imagine that Lars Pensjö and later Fredrik Hübinette et al may have taken some inspiration there.
I still maintain the CD LPMud driver for Genesis MUD at https://github.com/cotillion/cd-gamedriver.
There is not very much activity though since most critical issues have been fixed over the years and the game is very stable.
The last maintained LPMud fork that I know of is LDMud https://github.com/ldmud/ldmud . Would be cool if there are others.
The BEAM vm has a lot of the functionality you mention from LPC and Pike. Erlang being from the 80s—predating LPC—and also from Sweden, I imagine that Lars Pensjö and later Fredrik Hübinette et al may have taken some inspiration there.