diff --git a/README.adoc b/README.adoc
index c72aef6..207230e 100644
--- a/README.adoc
+++ b/README.adoc
@@ -1131,10 +1131,12 @@ ____
 
 === Simultaneous runs
 
-When doing long simulations, it becomes fundamental to do multiple simulations in parallel.
+When doing long simulations sweeping across multiple system parameters, it becomes fundamental to do multiple simulations in parallel.
 
 This is specially true for gem5, which runs much slower than QEMU, and cannot use multiple host cores to speed up the simulation: https://github.com/cirosantilli-work/gem5-issues/issues/15
 
+This also has a good synergy with <<build-variants>>.
+
 First shell:
 
 ....