Motivation
TeX.SE as well as external resources contain information from as far as 2010 regarding e.g. LuaTeX, XeLaTeX, microtype, and popular dilemmas such as KOMA/memoir or babel/polyglossia, which seem to be outdated… or are they?
Overview
For example, XeLaTeX is still labeled as beta and the last version seems to be from 28 May 2013 while microtype 2.5 alpha has been around since 23 May 2013. LaTeX3 also seems to be halting – the last issue of LaTeX3 news was published on 27 July 2012, but there has been a promise of two updates per year. The last available unicode-math (0.7e) was released on 4 April 2013 and the list continues.
The only apparently actively developed one is LuaTeX, but it has already been 7 years since the initial release and yet a stable release is not even in sight (0.78.2 preview was published on 13 January 2014). It was originally expected to reach 1.0 in 2002, the LuaTeX reference manual indicates it is due spring 2014 (which is now), and the most recent roadmap expects LuaTeX 1.0 bundled with TeX Live 2016, which is basically a 14 year delay.
Update [2014-12-27]: The 1.0 release has once again been postponed to TeX Live 2018. Hence, I rest my case.
Question
What is currently the most modern way of TeX-based typesetting?
It should include microtypographic features, UTF-8 support, preferably OTF fonts and compatibility with most basic classes like KOMA/memoir and packages such as pgfplots and biblatex with the use of biber.
Addendum
I tried to clarify this question as much as I could but I am having trouble defining the issue which could either be a sign of my irrational motives or the result of overall vagueness in this area. Yes, I believe it is vague and confusing – ranging from popular TeX.SE answers that include superfluous settings and abstract substantiation for preferring one of the alternatives (“babel is more complete than polyglossia, which is more modern”), to obscure information and the never ending confusion about TeX/LaTeX/LaTeX2e/LaTeX3/Xe(La)TeX/Lua(La)TeX/pdf(La)TeX/eTeX/ConTeXt/whatever else is out there.
I have decided to ignore XeLaTeX and experiment with LuaLaTeX with the option of switching back to pdfLaTeX should things go wrong. Thanks for your patience and apologies for the blabbering. :-)
microtypeis a LaTeX(2e) package, XeTeX is an engine, ... Specifically on LaTeX3, there should be a new release very soon (one issue outstanding: team discussion ongoing), and if you look at check-ins you'll see things are happening. Also, remember that 'stable' in the TeX world tends to me 'frozen for ever': notice that BibTeX has reached v0.99d and is never likely to reach v1! – Joseph Wright Mar 20 '14 at 17:08XeTeXwithmicrotypebecause there has been support for character protrusion inXeTeXfor quite some time but the development seems to have stopped there.LaTeX3is mainly for the benefit of package writers and for programming tasks as far as I am aware – my interest focuses on the area of end-user usability more, though. – Harold Cavendish Mar 20 '14 at 17:37expl3), but the 'big ideas' go well beyond that and indeed will be covered in the next LaTeX3 News (which I will push the team about). – Joseph Wright Mar 20 '14 at 17:44microtypefor XeTeX seems to have been stagnating for a year and I would like to know whether it is technical difficulties or possibly lack of time and/or motivation that is preventing the developers from implementing important features that are already available to LaTeX. Should it be the latter, I shall cross it off my list. – Harold Cavendish Mar 20 '14 at 18:06