[Tex/LaTex] Linux libertine, the {\l} character, ligatures, and T1 fontenc

Question

If I understand correctly from the answers to this question, the default OT1 encoding will not get me enough "font space" for the proper \l character. On the other hand, I can't seem to get ligatures (like Th, or Qu) working if I enable this option. I need to show the \l character though, and wonder if there is a way to get both (using plain LaTeX or PDFLaTeX as a compiler, don't want XeLaTeX cause its total layour is worse IMHO, or at least different than plain LaTeX, which makes me suspicious anyways).

MNWE:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{libertine}

\title{This is Quantifiably finally ligatured text}
\begin{document}
\maketitle
I need the character \l too though.  
\end{document}

With T1, not all ligatures show:

Without T1, the \l character doesn't show:

Commenting out the fontenc line, I get ligatures, but no proper \l (expected behaviour, cfr. this question). But I really want both. How can I do this? I'd accept solutions changing how I get at the \l character, as it only appears a small amount of times in nonessential text.

Answer 1

Load T1 before OT1, undeclare \l as an OT1 command and declare its default to be T1:

\documentclass{article}
\usepackage[T1,OT1]{fontenc}
\usepackage{libertine}

\UndeclareTextCommand{\l}{OT1}
\DeclareTextSymbolDefault{\l}{T1}

\title{This is Quantifiably finally ligatured text}
\begin{document}

\maketitle
I need the character \l{} too though.
\end{document}

Of course you lose some kerning pairs and hyphenation in words containing \l, but I don't think it's a big problem.

Here's what I get after copying the glyph from the PDF viewer window and pasting it in Unicode Checker

Update

As of the version of libertine released on 2017/03/20, the \l and \L commands do the right thing also with the OT1 encoding.

\documentclass{article}
\usepackage{libertine}

\title{This is Quantifiably finally ligatured text}
\begin{document}
\maketitle
I need the characters \l{} and \L{} too though.
\end{document}