Why the roadmap ends on "Beta Mainnet"? And even this and all futures steps without any date? Why you dont have clear roadmap with deadlines?
To put it simply, the beta mainnet phase only ends once enough of the public have tried and tested it (in real life) and appropriate improvements and fixes have been made. Only then once it's been tested and improved enough would it end beta testing phase, rather than a specific time-scale. Did you know for example Bitcoin Core is still technically in a "perpetual beta" phase as there hasn't been a 1.0 (final product) mainnet release? In case you don't believe me:
Bitcoin software is still in beta with many incomplete features in active development.
This is when you realise it doesn't matter about post-beta releases.