Why waste your time buying old daps/technology?
Because matured FW (sometimes even new fuctions that weren`t there at release)? Because physical buttons? Because of replaceable batteries and longer playtime due to that?
Because one doesn`t care about album art and its size on screen? Because it works flawlessly? Because it has fanbase that have done lot of FW and HW modifications?
Because of spare parts for broken unit? Because that source DAP sound signature and amping fits perfect with his/her IEM/Headphone?
There are many reasons...
Would I buy new Subaru Impreza instead my 2001 one (what I could get for a fraction of money of new one)?
No. There are lot of fan/userbase to it and lot of cheap spareparts. It has done 310 000km for now and still going strong.
I`ve had to fix only few times with minor issues (quite typical service stuff). New Impreza has a lot of electronical stuff which I couldn`t fix/locate problem when it breaks down and all that service would cost me a lot. I would rather stick with "barebone" old impreza and buy another one for spare parts if needed.
I Hope You got my point. Always running for new tech isn`t rational for wallet and if You REALLY LIKE Your old tech and it WORKS - then why to run for new? Just so You can say "I have new/newer than Yours"? Not my life philosophy.
I would buy DX50 anytime again from sales thread with lot cheaper price (even with HW upgrades involved) than newer DAPs.
Of course I would like to have DX120 atm but my DX5X still goes strong and it has all the quircks and requirements I need.
Same thing with IEMs/Headphones. When someone has found his/her perfect sound with all the gear - should You run for new tech? LOL NO!
Nowdays it`s kind of "sickness" to get everything new & "better"!