I agree that project is gone for good, which is a pity for us. I wonder if it's partly that moniker scaring off potential listeners, hence making up the name Shpongle and the puns in the track titles. The casual observer may not associate Shpongle with psychedelia. Mixing in other musical styles meant they could sell to fans of other genres like ambient and world music. It makes sense from a commercial perspective even if it's a bit disappointing to us old time goa fans.
It's interesting that years ago when the Twisted Music website had a forum, someone created a poll asking who wanted a new Hallucinogen album after apparently saying to Simon there was demand for it and he would find 1000 people interested. He wrote that Simon agreed he'd do it if the poll got 1000 votes. It got to just over 400. Eventually the forum was taken off the website and I don't really blame Simon for that because there weren't many people on there, mostly old timers I think, and some of them were really being too critical of his new work which isn't great when he needs to promote it.
Here it is, it was in 2010: https://web.archive.org/web/20120402144231/http://www.twistedmusic.com/forums/viewthread/4082/
I notice now on the Twisted website they've even removed the Hallucinogen bio and pasted the Shpongle one over it.
At one point I seem to remember Simon posting that he didn't really get time to do solo work as he was enjoying working with Raja Ram. However during the pandemic lockdown he recorded Flux and Contemplation which gives a taste of what his current solo work sounds like. He used his own name rather than Hallucinogen but it hardly matters. As I said, I like it.