When using Ubuntu 18.04 LTS/Linux Mint 19.x or any another modern Linux distro, you cannot use the older Wine versions prior to Wine 2.22 due to the problem: "Wine cannot find the FreeType font library. To enable Wine to use TrueType fonts please install a version of FreeType greater than or equal to 2.0.5." But these older Wine versions are often necessary for running older Windows games/apps, because older Windows games/apps often cause problems when running with newer Wine versions. Lutris has overcome this problem by using special 32-bit runtimes which enables using older Wine versions under Ubuntu 18.04/Linux Mint 19.xx, see "What is the Lutris runtime?" at https://github.com/lutris/docs/blob/master/LutrisRuntime.md.
Is it possible that PlayOnLinux can also use these compatibility runtimes? It would be great that PlayOnLinux combines the advanced features of Lutris and good compatibility with older games, combined with the ease of PlayOnLinux.