Why is the bitcoin client still in beta As of today the official bitcoin core version is 0.19.1 why has it not go to 1.0 version yet ?
Is there a timeline from the developer team ?

I have seen this similar question from 8 years ago: 
Why hasn&#39;t the Bitcoin client advanced to version 1.0? but there doesnt seem to be a proper answer/concensus, or maybe it has evolved from this date ?
Bitcoin Core probably will never have a &quot;1.0&quot;. 1.0 is a socially significant number which indicates some kind of finality or completeness (at least initially). This itself is holding back developers from declaring that there may even be a 1.0 or creating some timeline for a 1.0. Bitcoin Core is being continuously developed and there is no point at which many developers foresee it becoming this kind of &quot;final&quot; or &quot;complete&quot; that 1.0 implies.
There is no timeline nor a roadmap for 1.0. There isn't consensus that there should even be a 1.0. There isn't consensus on what features would be required for a 1.0. It is highly unlikely that there will ever be a 1.0. What is more likely to happen is that versioning stays as it is. Maybe in the future the leading 0 will be dropped, or perhaps some other continuous versioning scheme will be used (such as a date based one). But because of the social implications of 1.0, that will probably never happen.
A big part of this has to do with the release cycle of Bitcoin Core. Releases are done in a time based fashion - every 6 or so months, a new release is made. The primary version number just keeps getting bumped for every release. If Bitcoin had started with a 1.0 instead of a 0.1, we'd probably see the same pattern happening today, it would just be 19.1 instead of 0.19.1. But going to a 1.0 is changing the versioning scheme, and there is simply no reason to do that with the given versioning scheme. It would imply some kind of feature change or a major shift in development direction.

From 22.0 onwards, the leading 0 has been dropped from the version number. This was implemented in PR 20223. The last version to contain the leading 0 is 0.21.