The best replacement for soi is bulk.

The best alternatives to soi are rated as following:
★★★★★  bulk
★★  bulk cmos
★★  finfet
★  mct
★  bod
★  ma ca rong
★  90nm soi
  soit
  doi
  amour propre
  gaas

Your alternative for soi is not listed? Suggest!
Speaking about soi, one probably shouldn't forget about nakago.

Other search terms related to soi and their ratings are:
★★★★★ nakago
You have in mind a companion for soi and it is not yet here? Propose!



Google Trends

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soi
bulk
bulk cmos