@girish A couple of years ago, the maintainer of YaCy stated he wasn't going to do any further unpaid work to improve the project. Some improvements have happened since then, though these are largely the result of a paid project he is supporting. I haven't looked at the websited for a while but that certainly has had some big changes of late.
UPDATE!
Big changes have happened on the YaCy project website. There is a live demo of an instance now for people to try:
https://yacy.searchlab.eu/Status.html
brave_dNLslyBHTt.jpg
The YaCy Grid project has got off the ground now too. (The maintainer wanted this to be the way forward.)
If you haven't visited https://searchlab.eu recently, it is worth a look
https://searchlab.eu/en/access/download/