Commander 2020 decks will likely retain value for longer due to the number and quality of the contents (see New Cards below), but they also cost more to buy in the first place
Even without plotting, this card can still easily draw cards on rate with other three-mana draw spells
Yes, at a three-mana initial investment, Frantic Search is going to be awkward with Arclight Phoenix at times, but in combination with bouncelands or cost reduction effects like Baral, Chief of Compliance, Frantic Search would do ridiculous things
Tezzeret's main place is in Fleshraker Vintage decks that cost $6,000, where he can fetch all your Power 9 cards like Mox and Black Lotus, or grab a Vexing Bauble to stop anyone else doing the same
Separate, but related are cards that trigger when they leave the battlefield
Say, for example, I had an upcoming Booster Draft tournament using Khans of Tarkir , but I didn't have much time to practice the new set