As most cyclocrossriders, he has some benefits in building physical capabilities. Resulting in physical resistance and/or punch and/or speed. We all known the beasts VDP and Van Aert. But also second class crossers, with all due respect, who became a road racer later in life, appear to be or become (sub)toppers in certain specialties. Merlier is a topsprinter, Hermans an allrounder, Vermeersch (superdomestique of VDP and Philipsen) is allround on cobbles and Flanders classics and gravel.
Thibau Nys was trained from an early age by his father (technical) and a whole team of specialists. With results at very young age. The only problem is that he doesn't seem to have an impressive engine. As a U 23 he couldn't prove himself so dominant anymore. At least in cyclocross. On the road he became European champion U 23 defeating Ayuso and co. Later also worldchampion U 23 in cyclocross. Also showing his talent as a pro, but only "now and then".
Thibau Nys will never be able to develop the watts of a Van Aert and MVD. Will never be a real climber, nor a topsprinter. I think he"ll have a future in (semi) classics and short stageraces. Maybe in a few years also in "Flanders". Roubaix could be too difficult with its engine. And Liège too long and demanding in climbing. Grand Tours ? We"ll see. I think the first stages will go fine. But after a few mountain rides?
Of course, he will develop and his engine will become more performant. But the riders of his generation will benefit from the same. But he will be an interesting rider to follow up.