Speaking from experience? Thanks for giving me chance to return the favor! :-)
Like i said there is no such thing as platonic love. It only happens in novels or movies etc.
We are mixing this term too much here. It's not about BIL or SIL kind of relation.
Unfortunately with increasing worries about holding down the job, kids getting good careers, insufficient pension plans, aging parents etc. many people are into platonic love with their spouses as early as 40's.