When 70% of instants and sorceries in my cube are 1 or 2 mana and the average CMC of such cards is about 2.5 (realistically a lot lower as so many of the high cost cards have delve or pitch and alternate costs) you start to appreciate how good four mana and higher spells must be
After those, and a few more commanders that either you or other folks on the RC think might be problematic, were somewhere north of 200 cards
You can't add more than 100 damage in this way
Nearly two years later, the boom is still, well, booming
If youre playing a green deck and have enough green cards to support Force of Vigor (around 16 others at minimum), the card should be almost a must-have in your sideboard which makes it a top tier candidate for the best sideboard options green decks can choose from
Any deck with a dodgy mana base will happily pad out a list with some of these cards