I wonder if I can use "ever" in place of "more and more". For example, do the following two sentences have the same meaning?
- Software is getting more and more complex.
- Software is getting ever complex.
This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information. See the FAQ for guidance on how to improve it.
As Kris notes, you should say "getting ever so complex" rather than "ever complex".
But that said, why? "ever so" is a pretty archaic phrase. Frankly, if you use it, you'll sound like a 90-year-old lady.
I would suggest "Software is getting ever more complex" or "Software is getting more and more complex" as being more correct. Your latter example sounds awkward/wrong.