re: belgian use of sugar - i remember reading, probably common knowledge now, that based on old samples of belgian beers from the 70s they had very little if any sugar/candi sugar added, i think 5% or less. so its not a strictly belgian "tradition" if a tradition at all
re: reinheitsgebot. that only applied to bavaria from 1516 until a time in the 20th century really
"The Bavarian order of 1516 formed the basis of rules that spread slowly throughout Germany. Bavaria insisted on its application throughout Germany as a precondition of German unification in 1871. The move encountered strong resistance from brewers outside Bavaria, and imperial law of 1873 taxed the use of other ingredients (rather than banning them) when used by Northern German brewers.[6] It was not until 1906 that the law was applied consistently across all of Germany,[6] and it was not formally referred to as Reinheitsgebot until the Weimar Republic.[20]
In 1952, the basic regulation of the Reinheitsgebot were incorporated into the West German Biersteuergesetz (Beer Taxation Law). Bavarian law remained stricter than that of the rest of the country, leading to legal conflict during the '50s and early '60s.[20] The law initially applied only to bottom-fermented ("lager") beers, but brewers of other types of beer soon accepted the law as well. "
Considering it guarantees a certain baseline quality for my beloved pilsners/bocks/weisses etc, i do like it, but only because I can choose from the beer of so many other countries. if i had to live under it... phew, ya no thanks