I was involved in this one too with JB and his merry men, was merely a feasibility study, and it was never a case of 'We are doing this, we are restoring XYZ', was just seeing what was possible and as we found out, not all the pieces of the jigsaw were available to complete it, so no egg on face really as it was all kept low down. Of course if anything was going to happen it would have been publicised well
I now reside in the area and there's very little if any reminders of the railway that was here - few buildings in Athboy and what's left of the platform and an old road bridge in Trim along with some pillars over a long gone bridge over the River Boyne. A huge plus was there were no level crossings or underbridges - the hump back bridge on the Trim-Athboy road was the only one, and the road went over the railway.
We are not Britain, and population is very small compared to theirs, so less interest
Ultimately preservation is about being realistic and not dreaming. Occasionally dreams come through, but not every time. Same in the UK too, theres been plenty of closed/abandoned projects for whatever reason, and other stuff that would be great if it happened, but there's an obstacle or fifteen in the way