I haven't received any response for this thread. But went ahead experimenting with a few QlikStarts.
If I remember correctly, the V10.xx versions still work in QV11. I did encounter an error in the FI QlikStart, but didn't look for the cause. Data extraction will always work since SAP doesn't change table names that often (only in the new HANA systems (eg. S/4 HANA for Finance, a big change in table names/reduction in the number of tables have occurred. Changes in field names, types & length might occur, but not very often and is not related to the QV version, rather than the SAP version.
Conclusion: you can use the V10.xx QlikStarts in QV11, but be prepared you might encounter small issues (may not be related to the QV).