even if you set inital = next then you still dont truely have uniform extents

check this out for an explantion from asktom

Well, if we have initial=next and pctincrease=0 in DMT and use dbms_space_admin to migrate to LMT, then we can get uniform extents that is get the full benefit
of LMT. What are your thoughts


Followup

Not really, a migrated tablespace won't have the bitmaps at the "front" like a natural one would -- and the extents probably aren't all exactly the same, the algorithm allows for some rounding and different sized extents in a DMT even with intial=next and pctincrease=0