It's good that development is on-going, but it's a bit saddening that the official client is closed-source and single-platform (if I am not mistaken! Haven't seen an indication to the contrary on the site).

I think the platform would fare better, and would decline less, if the software were developed more openly.

Note that there is a FOSS client for Linux (and maybe other operating systems): aMule.

https://github.com/amule-project/amule/

And while it seems some development (last commit was 8 days ago), it has not seen a proper release for 4 years.