Er... Lukla is nice but the best, most detailed...? I suppose it's very personal but although the five main airports are on par with for instance Orbx Innsbruck they are a lot smaller and the surrounding textures are mostly (extremely) low res and sometimes even rasterized... Houses and trees stick out very obviously all over the place... I do enjoy flying around it with visibility set below medium but Orbx's airports are all better and so is TrueEarth Netherlands. Imho. Lukla is nice to have because it portrays a part of the world you won't find too often in a flightsim but I mainly bought it because there hardly are any add ons for AFS2 and to support development of the sim by 3rd parties. Even IPACS's Florida looks a lot better than Lukla.
I should have added that I say this from the POV of flying almost exclusively in VR. I disagree that TrueEarth Netherlnds is better though. It has much coarser textures on buidings and terrain. again as viewed in VR, but obviously covers a bigger land area etc.. Not my intention to engage in hyperbole, but I am genuinely blown away by Lukla for AFS2!