Complex sentence: In past years, schematic diagrams with largely discrete components were fairly readable however with the newer high pin-count parts and with the almost universal use of standard letter or A4 sized paper, schematics have become less so.
Split into simpler sentences: In past years, schematic diagrams with mostly discrete components were fairly readable. However, with the newer high pin-count parts and with the almost universal use of standard letter or A4 sized paper, schematics have become less so.