I'm ranking this one right on the cusp of the release of Ursula's Return, so it's difficult to make predictions around the price and popularity of the cards here
In the vast majority of games, the life that your opponent gains from you nuking their creatures with Swords to Plowshares will not amount to much, unless theyre playing a black deck with life-to-resource cards (watch out for Toxic Deluge or worse, Yawgmoths Bargain !) Swords to Plowshares isnt a particularly expensive card, and its very easy to find
Interestingly enough, this Drop doesn't just reprint Dogmeat, Ever Loyal from the Scrappy Survivors deck
Yes, the Japanese Mythical Archive variants are available in set boosters, but only from Japanese language boosters
Ill be covering the ally colors in this article, so Azorious, Dimir, Rakdos, Gruul, and Selesynia, but come back next week, where I will go over some enemy-colored commanders
The eternal debate and the answer is more nuanced than you think