SJSinNYC:
The question wasn’t aimed in general, the discussion was about the Brisker opinion on Rav Shlomo Zalman himself after his shita. But I appreciate your opinion.
What I means was there is ALWAYS more Torah to keep, its called Spiritual Growth. Whatever path that you are on, there is always more room to grow in your avodah, whether it be learning with more hasmoda, strengthening your dveikus, strengthening your shemiras Shabbos, taking on chumros. Therefor a persons observance can ONLY be in degrees as once you keep one mitzvah in the Torah l’shem mitzvah you are an observant Jew.