Nowadays the Power Creep means competitive cards become increasingly difficult to find and what's good can change quickly, and level-up reward cards tend to be less powerful than before
Occasionally theyd still miss something, either because they didnt catch it during proofreading, they missed it in the long list of stuff they were supposed to fix, or they messed it up accidentally while trying to fix something else
You have a little bit more control and warning over any conflicts they might have with same name walkers
Competitive formats like Modern and Legacy, and the sometimes-competitive format of Commander, all call for the cream of the crop for deckbuilding, and some cards have really made a name for themselves
BT15-070 C Digimon Lv.3 Alternative Art DemiDevimon Color Purple Cost 3 DP 1000 Digivolve Cost 1 Purple 0 from Lv.2 Form Rookie Attribute Virus Type Evil Card Text 1 [Effect] [On Play] Reveal the top 4 cards of your deck