I think Ludwig gets a bad reputation because of quality issues they had in the 1990s and because their kits are surprisingly affordable compared to most other big and small companies. For example, a 3 pc. bebop Ludwig Classic Maple kit averages about $600 or so less than a 3 pc. bebop kit from N&C, Pork Pie, Yamaha, Tama, etc., etc. (note: when comparing to the big companies, the CMs are up against Maple Absolutes, Starclassic Maples, etc.).
From what I have heard and seen lately, the Classic Maples and Legacy Classics are very solid, good kits indeed. The LCs are more price on par with high-end Tama, Yamaha, and the rest of the bunch, but the Classic Maples are a steal.
For example, I spoke with one trusted drum shop on the East Coast that carries Ludwig and Noble & Cooley, and the shop told me that they felt the Classic Maples were pretty close to being on par with N&C's CD Maple custom kits. They differ in sound, of course, due to different bearing edges and ply configuration of the shells (for example, Ludwig CM tom = 7 ply/6 mm; N&C tom = 6 ply/5 mm), but this shop said the quality differences are minimal (e.g., the N&C kits have slightly smoother bearing edges on average and have solid brass lugs and offer any finish you want).
So, that's a pretty good argument for Ludwig. N&C kits are great: they sound clean, clear, and are super well made. But if the Ludwig CMs are that close to N&C's kits, can you justify the N&C kits or other high-end kits in a similar config. and lacquer costing you $700-$800 more on average? Plus, Ludwig CM or LC kits offer a range of hardware options.
In the end, though, as Harry rightly notes, it comes down to what sound you like. I have played and heard, for example, high-priced DW Jazz Series kits and Yamaha Maple Custom Absolute bebop kits, and the Classic Maples sound so much more resonant and open.
A note about not seeing people use Classic Maple kits: remember, too, that drum visibility on the professional scene has a lot to do with other factors than drum sound. Endorsements can be about an artist loving a kit's sound, but it can also simply be about artist support for travel (e.g., Tim Alexander left Pork Pie for Tama because it is easier for Tama to supply Tim with kits all over the world, not because Tama is better than PP) or other marketing deals. How many times have we seen big drum players praise Zildjian, for example, and then leave for Sabian or Agop a couple of years later?