Pros: Grass has a TON of trainer support with Forest of Vitality, Bug Catching Set, Teal Mask Ogerpon, etc
Popular trading games like Magic: The Gathering (MTG) or Pokmon TCG will often see many proxy cards
Its a nasty habit, but theres finally a glimmer of good in it
Of course, in terms of stats there are a few more powerful options these days, but in terms of filling out the curve and offering some externalities, Blade Splicer continues to be among the first white three-mana cards that I consider for Cube inclusion
Another way to think of this is, "Do we want the flicker cards to enhance your cards or hurt your opponents' cards?" You tend to flicker things of yours that you want to come back into play, such as cards with "enter the battlefield" (ETB) effects, while you tend to flicker things of your opponents they don't want to have leave and come back, such as creatures with +1/+1 counters and Auras