You missed so much in those 5 years OP. I feel the same as I should have bought more when I had the chance.
The miners are still profitable, a bit less than the first asics, but you can still get a nice return. The problem is the cost of each unit and its power consumption. While years ago you could buy a cheap Asic, that consumed ~300W and costed a few hundred USD, like antminer S1, now you're forced to buy a machine that needs 3 times that and costs much more. Home mining or hobby mining is a thing of the past.
coolcoinz, Thanks for your input, it helps me to understand it in a better way.
You'll want to check out the service
Nicehash, which lets you buy and sell hashrate for different mining algorithms and convert it to Bitcoin. If you're mining with your GPU, that might be a good choice.
SHA-256 ASICs are very developed and the Antminer S9, for example, is very popular right now.
Scrypt ASICs aren't fully developed. There are developing ones like the
L3+, but you can expect the difficulty to rise a lot and your ROI won't be as quick as you thought at first.