I am actually becoming a bigger fan of etfs. Generally lower fees, can set a limit instead of buying/selling at end of day blind, and you actually get the dividends from the stocks for a dividend etf.
I am not at all clear why you wouldn't do this if you are just tracking an index.
If you are playing for the long haul, limit orders do not matter. Place a buy once per month for 1/12th of your commitment, and forget about it.
For fees sure - see what fees are lowest for you (ETF vs Mutual fund). Last time I did the math for me, mutual funds ended up giving me more money in my pocket at the end of 10 years, because of no trading fees. I think if you reach a certain point in 1 purchase (100k??) ETF wins. Maybe the optimal strategy is to use a mutal fund, then when that fund hits 100k - sell it all off and put in an ETF for a lower yearly fee. Have not done the math when the exact right place to do this is, would be curious. But I know if you are doing small 400-2000 buys per month, ETF fees add up as a % of the price.
Mutual funds still throw off dividends. It's just common to reinvest them. If you're investing for the long haul then being able to set limit orders isn't really that important. Being able to buy/sell fractional shares is pretty nice.
No, the main differences are on the upside, with an etf you tend to get a better net expense ratio, and they can help you avoid some cap gain tax because of how they can handle stock exchanges, and on the downside, bid spread when there is low volume, which an bite you in the ass.
I am not at all clear why you wouldn't do this if you are just tracking an index.