MTG would have a much more standardized art style as it goes on, which is in my opinion is quite good for the franchise
Sometimes you see the Legendary Serpent feature in Standard Simic-style ramp decks as an uncounterable win condition
Restoration Angel Restoration Angel is a classic
Basically, the TLDR is that you can build an almost infinite number of really fun, solid, and competitive Commander decks for free with the help of the card-rental programs
Sickening Shoal, Shining Shoal, Frenzied Goblin, Faith's Fetters, Devouring Light, Compulsive Research, Kira, Manriki Gusari, Telling Time and Chord of Calling have all enjoyed time in the cube and a lot of play over the years
Better in slower cubes with less card synergy in favour of card power levels but in my cube it rarely finds a home