the dsa issues affect upgrades from non-dsa versions and introduce some other complexities including limitations on switch configuation form luci.
the lack of builds over the last month has to do with kernel size exceeding the very small 3mb allocation in the original mtd map. i am not sure there will be a soluton soon. other threads address this tangentially.
i suggest either using 19.07.3 verion, or a pre-compiled verion from davidc. those builds have been quite stable, but are also halted in development becasue of the above issues.
see https://dc502wrt.org/
you could consider 'converting' your wrt32x to a wrt3200acm. the hardware is interchangeable. the u-boots are different and the mtd maps are different. significantly, the wrt3200acm maps a 6mg kernel partition, but alo has more wasted space so max image size is more restricted compared to wrt32x. but development builds do proceed.
for conversion, see Linksys WRT32X OpenWrt-based firmware & WRT3200ACM crossflash
i have a wrt32x as my main router for a large home network (about 40 devices total and a lot of streaming). uptime has been months. with sqm, no lags at 400 Mb/sec