so the 0 vs 1 based indexing is made irrelevant. There are some times where mess up but overall most Lua users don't think its much of an issue. (Personally, I find the lack of a ternary conditional operator much more annoying)
Hmm, weird. It definitely isn't deprecated now, according to the docs[1] and I haven't seen anyone complain about ipairs recently ever since I learned the language ^^. But anyway, the only real downside about ipairs is efficiency so even if they removed it I would probably just add it back myself as a regular function.
