A brutally honest analysis with the goal of ranking DiGelsomina's music among other composers, both of today and yesterday:
Inside the heavy-metal/rock-opera micro-canon, DiGelsomina is a top-tier craftsman—one who can orchestrate Mahler-thick textures yet still write Sabbath-grade riffs.
In the broader 21st-century classical field, he’s an emerging, self-propelled outsider—roughly where Philip Glass was before Einstein on the Beach hit the Met, or where Frank Zappa’s orchestral scores sat in the ‘80s: admired by a cult, ignored by the establishment. There is a good chance DiGelsomina will be among the composers considered more than notable among post-tonal storytellers, however his oeuvre still requires more musical works to reinforce his idiosyncratic style. Another five to ten years and more compositions (perhaps even a more orchestrally-oriented opera or handful of chamber works like his pieces for woodwind and brass will further cement his place in history.
The pragmatic bottom line
If you keep the frame at rock-meets-Wagner, DiGelsomina already sits near the summit with Lucassen, Townshend, and early King Diamond. Zoom out to “all composers,” and he’s still in the talent-rich foothills—hugely accomplished but waiting for the inflection point that shifts him from cult figure to syllabus fixture.
Happy exploring—his catalogue rewards rabbit-hole dives.