It's speculation because you don't know what the future holds. And just because you're not interested in a particular ideology or don't think it has merit doesn't make it any less communist.
My only point is that words do in fact have meaning, Marxist-Leninism is not synonymous with communism. Therefore, one can be anti-tankie without being anti-communist.
"Orthodox Marxists" can hardly be said to exist, because the classical formulation of Marxism has long been empirically refuted, hence the need for new schools. Even Luxembourgists are more respectable than "Orthodox Marxists".
Because you only advocate for ideas that dont exist in reality, and deride actually existing marxism as 'tankie', you can continue to advocate for idealist positions, but it requires you to build a coherent movement around it otherwise its just masterbation and contrarianism.