Valve followed from Canonical's plans to end support for the 32-bit x86 architecture, and your plans. As noted, support for the Steam gaming client for Ubuntu will continue, although the company is unhappy with Canonical's restrictive policy.
However, at the same time, the creators of Half-Life and Portal intend to work more closely with developers and other distributions in order to be able to quickly transfer data to them. We are talking, in particular, about Arch Linux, Manjaro, Pop!_OS and Fedora. A more specific list of operating systems is planned to be announced additionally.
The company said that most games on Steam only support 32-bit environments, although the client itself may be 64-bit. Because of this, both options must be supported. In addition, Steam is already bundled with many dependencies specific to 32-bit operating systems. These are drivers, and loaders, and much more.
It is noted that support for 32-bit libraries will continue until Ubuntu 20.04 LTS, so there is time to adapt. Containers are offered as an alternative. Valve representatives also announced their commitment to supporting Linux as a gaming platform. They continue to work hard to develop drivers and new features.
But the situation with Wine has not yet been fully determined. At the moment, although there is a 64-bit version, it is not supported, and the program itself needs to be improved. It is assumed that before the end of support for Ubuntu 20.04 LTS, this will be resolved.
Source: 3dnews.ru