The trunk version is the most recent developer version and may be obtained from Squeak Downloads
Squeak 5.3 was released on March 3, 2020 and trunk development resumed in 6.0alpha.
After the 5.2 release in October 2018, it was decided by the Squeak board to go for a 5.3 release next instead of directly for a 6.0 release.
This is because more time will be required to deal with ephemerons and the Etoys cleanup (Etoys in 2018).
Therefore the recent trunk folder pointed to 5.3alpha. During the release process, this may change to 5.3beta, 5.3rc1, and so on. After that, the next trunk version is likely to be 5.4alpha.
Still, the 6.0alpha directory exists but has not been updated since May 2018 as all new changes go into 5.3alpha currently. This actually means that 5.2, 5.3alpha, and 5.3beta are all newer than 6.0alpha!
Since the 5.1 release, we are collecting deprecations in the 60Deprecated package. There is no 52Deprecated package. There is also no 53Deprecated package. There will be no 54Deprecated package. It is very like that, after the 5.3 release, we will unload 45Deprecated, 46Deprecated, and (maybe even) 51Deprecated from trunk.
